36 files changed, 1186 insertions, 699 deletions

diff --git a/editors/code/package-lock.json b/editors/code/package-lock.json
index a41497a23..4c5c13646 100644
--- a/editors/code/package-lock.json
+++ b/editors/code/package-lock.json
@@ -60,9 +60,9 @@
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         "@types/node": {
-            "version": "10.14.13",
-            "resolved": "https://registry.npmjs.org/@types/node/-/node-10.14.13.tgz",
-            "integrity": "sha512-yN/FNNW1UYsRR1wwAoyOwqvDuLDtVXnaJTZ898XIw/Q5cCaeVAlVwvsmXLX5PuiScBYwZsZU4JYSHB3TvfdwvQ==",
+            "version": "12.12.21",
+            "resolved": "https://registry.npmjs.org/@types/node/-/node-12.12.21.tgz",
+            "integrity": "sha512-8sRGhbpU+ck1n0PGAUgVrWrWdjSW2aqNeyC15W88GRsMpSwzv6RJGlLhE7s2RhVSOdyDmxbqlWSeThq4/7xqlA==",
             "dev": true
         },
         "@types/resolve": {
@@ -81,9 +81,9 @@
             "dev": true
         },
         "@types/vscode": {
-            "version": "1.37.0",
-            "resolved": "https://registry.npmjs.org/@types/vscode/-/vscode-1.37.0.tgz",
-            "integrity": "sha512-PRfeuqYuzk3vjf+puzxltIUWC+AhEGYpFX29/37w30DQSQnpf5AgMVf7GDBAdmTbWTBou+EMFz/Ne6XCM/KxzQ==",
+            "version": "1.41.0",
+            "resolved": "https://registry.npmjs.org/@types/vscode/-/vscode-1.41.0.tgz",
+            "integrity": "sha512-7SfeY5u9jgiELwxyLB3z7l6l/GbN9CqpCQGkcRlB7tKRFBxzbz2PoBfGrLxI1vRfUCIq5+hg5vtDHExwq5j3+A==",
             "dev": true
         },
         "acorn": {
@@ -131,6 +131,12 @@
                 "sprintf-js": "~1.0.2"
             }
         },
+        "atob": {
+            "version": "2.1.2",
+            "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
+            "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==",
+            "dev": true
+        },
         "azure-devops-node-api": {
             "version": "7.2.0",
             "resolved": "https://registry.npmjs.org/azure-devops-node-api/-/azure-devops-node-api-7.2.0.tgz",
@@ -198,6 +204,17 @@
                 "ansi-styles": "^3.2.1",
                 "escape-string-regexp": "^1.0.5",
                 "supports-color": "^5.3.0"
+            },
+            "dependencies": {
+                "supports-color": {
+                    "version": "5.5.0",
+                    "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+                    "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+                    "dev": true,
+                    "requires": {
+                        "has-flag": "^3.0.0"
+                    }
+                }
             }
         },
         "cheerio": {
@@ -215,22 +232,44 @@
             }
         },
         "cliui": {
-            "version": "4.1.0",
-            "resolved": "https://registry.npmjs.org/cliui/-/cliui-4.1.0.tgz",
-            "integrity": "sha512-4FG+RSG9DL7uEwRUZXZn3SS34DiDPfzP0VOiEwtUWlE+AR2EIg+hSyvrIgUUfhdgR/UkAeW2QHgeP+hWrXs7jQ==",
+            "version": "5.0.0",
+            "resolved": "https://registry.npmjs.org/cliui/-/cliui-5.0.0.tgz",
+            "integrity": "sha512-PYeGSEmmHM6zvoef2w8TPzlrnNpXIjTipYK780YswmIP9vjxmd6Y2a3CB2Ks6/AU8NHjZugXvo8w3oWM2qnwXA==",
             "dev": true,
             "requires": {
-                "string-width": "^2.1.1",
-                "strip-ansi": "^4.0.0",
-                "wrap-ansi": "^2.0.0"
+                "string-width": "^3.1.0",
+                "strip-ansi": "^5.2.0",
+                "wrap-ansi": "^5.1.0"
+            },
+            "dependencies": {
+                "ansi-regex": {
+                    "version": "4.1.0",
+                    "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+                    "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
+                    "dev": true
+                },
+                "string-width": {
+                    "version": "3.1.0",
+                    "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+                    "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
+                    "dev": true,
+                    "requires": {
+                        "emoji-regex": "^7.0.1",
+                        "is-fullwidth-code-point": "^2.0.0",
+                        "strip-ansi": "^5.1.0"
+                    }
+                },
+                "strip-ansi": {
+                    "version": "5.2.0",
+                    "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+                    "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
+                    "dev": true,
+                    "requires": {
+                        "ansi-regex": "^4.1.0"
+                    }
+                }
             }
         },
-        "code-point-at": {
-            "version": "1.1.0",
-            "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
-            "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
-            "dev": true
-        },
         "color-convert": {
             "version": "1.9.3",
             "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
@@ -247,9 +286,9 @@
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-            "version": "2.20.0",
-            "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.0.tgz",
-            "integrity": "sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==",
+            "version": "2.20.3",
+            "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
+            "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
             "dev": true
         },
         "concat-map": {
@@ -258,19 +297,6 @@
             "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
             "dev": true
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-        "cross-spawn": {
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-            "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
-            "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
-            "dev": true,
-            "requires": {
-                "nice-try": "^1.0.4",
-                "path-key": "^2.0.1",
-                "semver": "^5.5.0",
-                "shebang-command": "^1.2.0",
-                "which": "^1.2.9"
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         "css-select": {
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             "resolved": "https://registry.npmjs.org/css-select/-/css-select-1.2.0.tgz",
@@ -290,12 +316,12 @@
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-            "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
-            "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+            "version": "3.2.6",
+            "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
+            "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
             "dev": true,
             "requires": {
-                "ms": "2.0.0"
+                "ms": "^2.1.1"
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@@ -304,6 +330,12 @@
             "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=",
             "dev": true
         },
+        "decode-uri-component": {
+            "version": "0.2.0",
+            "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
+            "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
+            "dev": true
+        },
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@@ -372,15 +404,6 @@
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-        "end-of-stream": {
-            "version": "1.4.1",
-            "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
-            "integrity": "sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==",
-            "dev": true,
-            "requires": {
-                "once": "^1.4.0"
-            }
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             "resolved": "https://registry.npmjs.org/entities/-/entities-1.1.2.tgz",
@@ -388,23 +411,27 @@
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-            "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.13.0.tgz",
-            "integrity": "sha512-vDZfg/ykNxQVwup/8E1BZhVzFfBxs9NqMzGcvIJrqg5k2/5Za2bWo40dK2J1pgLngZ7c+Shh8lwYtLGyrwPutg==",
+            "version": "1.16.3",
+            "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.16.3.tgz",
+            "integrity": "sha512-WtY7Fx5LiOnSYgF5eg/1T+GONaGmpvpPdCpSnYij+U2gDTL0UPfWrhDw7b2IYb+9NQJsYpCA0wOQvZfsd6YwRw==",
             "dev": true,
             "requires": {
-                "es-to-primitive": "^1.2.0",
+                "es-to-primitive": "^1.2.1",
                 "function-bind": "^1.1.1",
                 "has": "^1.0.3",
+                "has-symbols": "^1.0.1",
                 "is-callable": "^1.1.4",
                 "is-regex": "^1.0.4",
-                "object-keys": "^1.0.12"
+                "object-inspect": "^1.7.0",
+                "object-keys": "^1.1.1",
+                "string.prototype.trimleft": "^2.1.0",
+                "string.prototype.trimright": "^2.1.0"
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         "es-to-primitive": {
-            "version": "1.2.0",
-            "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.2.0.tgz",
-            "integrity": "sha512-qZryBOJjV//LaxLTV6UC//WewneB3LcXOL9NP++ozKVXsIIIpm/2c13UDiD9Jp2eThsecw9m3jPqDwTyobcdbg==",
+            "version": "1.2.1",
+            "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.2.1.tgz",
+            "integrity": "sha512-QCOllgZJtaUo9miYBcLChTUaHNjJF3PYs1VidD7AwiEj1kYxKeQTctLAezAOH5ZKRH0g2IgPn6KwB4IT8iRpvA==",
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@@ -439,6 +466,16 @@
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+        "eslint-plugin-prettier": {
+            "version": "2.7.0",
+            "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-2.7.0.tgz",
+            "integrity": "sha512-CStQYJgALoQBw3FsBzH0VOVDRnJ/ZimUlpLm226U8qgqYJfPOY/CPK6wyRInMxh73HSKg5wyRwdS4BVYYHwokA==",
+            "dev": true,
+            "requires": {
+                "fast-diff": "^1.1.1",
+                "jest-docblock": "^21.0.0"
+            }
+        },
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@@ -452,25 +489,16 @@
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-            "integrity": "sha1-Cr9PHKpbyx96nYrMbepPqqBLrJs=",
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-                "p-finally": "^1.0.0",
-                "signal-exit": "^3.0.0",
-                "strip-eof": "^1.0.0"
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+        "fast-diff": {
+            "version": "1.2.0",
+            "resolved": "https://registry.npmjs.org/fast-diff/-/fast-diff-1.2.0.tgz",
+            "integrity": "sha512-xJuoT5+L99XlZ8twedaRf6Ax2TgQVxvgZOYoPKqZufmJib0tL2tegPBOZb1pVNgIhlqDlA0eO0c3wBvQcmzx4w==",
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@@ -517,19 +545,10 @@
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-            "version": "7.1.4",
-            "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.4.tgz",
-            "integrity": "sha512-hkLPepehmnKk41pUGm3sYxoFs/umurYfYJCerbXEyFIWcAzvpipAgVkBqqT9RBKMGjnq6kMuyYwha6csxbiM1A==",
+            "version": "7.1.6",
+            "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
+            "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
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@@ -562,9 +581,9 @@
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-            "integrity": "sha1-uhqPGvKg/DllD1yFA2dwQSIGO0Q=",
+            "version": "1.0.1",
+            "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.1.tgz",
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@@ -595,12 +614,29 @@
             "requires": {
                 "agent-base": "4",
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+            },
+            "dependencies": {
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+                    "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
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+                    "dev": true,
+                    "requires": {
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+                    "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
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-            "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-2.2.3.tgz",
-            "integrity": "sha512-Ytgnz23gm2DVftnzqRRz2dOXZbGd2uiajSw/95bPp6v53zPRspQjLm/AfBgqbJ2qfeRXWIOMVLpp86+/5yX39Q==",
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@@ -618,9 +654,9 @@
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@@ -629,16 +665,10 @@
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-            "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-2.0.3.tgz",
-            "integrity": "sha512-U15Q7MXTuZlrbymiz95PJpZxu8IlipAp4dtS3wOdgPXx3mqBnslrWU14kxfHB+Py/+2PVKSr37dMAgM2A4uArw==",
+            "version": "2.0.4",
+            "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-2.0.4.tgz",
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@@ -683,19 +713,13 @@
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-            "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ=",
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@@ -1740,9 +1709,9 @@
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diff --git a/editors/code/package.json b/editors/code/package.json
index e21dfa174..8e7046418 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -13,7 +13,7 @@
         "Other"
     ],
     "engines": {
-        "vscode": "^1.37.0"
+        "vscode": "^1.41.0"
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     "scripts": {
         "vscode:prepublish": "npm run compile",
@@ -27,33 +27,37 @@
         "travis": "npm run compile && npm run test && npm run lint && npm run prettier -- --write && git diff --exit-code"
     },
     "prettier": {
+        "singleQuote": true,
         "tabWidth": 4,
-        "singleQuote": true
+        "trailingComma": "all"
     },
     "dependencies": {
-        "seedrandom": "^3.0.1",
-        "vscode-languageclient": "^5.3.0-next.4",
+        "lookpath": "^1.0.4",
+        "seedrandom": "^3.0.5",
+        "vscode-languageclient": "^6.0.0-next.9",
         "jsonc-parser": "^2.1.0"
     },
     "devDependencies": {
         "@types/glob": "^7.1.1",
         "@types/mocha": "^5.2.7",
-        "@types/node": "^10.14.13",
+        "@types/node": "^12.12.21",
         "@types/seedrandom": "^2.4.28",
-        "@types/vscode": "^1.37.0",
-        "glob": "^7.1.4",
-        "mocha": "^6.2.0",
-        "prettier": "^1.18.2",
-        "rollup": "^1.23.1",
+        "@types/vscode": "^1.41.0",
+        "glob": "^7.1.6",
+        "mocha": "^6.2.2",
+        "prettier": "^1.19.1",
+        "rollup": "^1.27.13",
         "rollup-plugin-commonjs": "^10.1.0",
         "rollup-plugin-node-resolve": "^5.2.0",
+        "rollup-plugin-sourcemaps": "^0.4.2",
         "rollup-plugin-typescript": "^1.0.1",
         "shx": "^0.3.1",
-        "tslint": "^5.18.0",
+        "tslint": "^5.20.1",
         "tslint-config-prettier": "^1.18.0",
-        "typescript": "^3.5.3",
-        "vsce": "^1.67.0",
-        "vscode-test": "^1.2.0"
+        "tslint-plugin-prettier": "^2.0.1",
+        "typescript": "^3.7.3",
+        "vsce": "^1.71.0",
+        "vscode-test": "^1.3.0"
     },
     "activationEvents": [
         "onLanguage:rust",
@@ -279,7 +283,7 @@
                 },
                 "rust-analyzer.useClientWatching": {
                     "type": "boolean",
-                    "default": false,
+                    "default": true,
                     "description": "client provided file watching instead of notify watching."
                 },
                 "rust-analyzer.cargo-watch.arguments": {
@@ -297,6 +301,11 @@
                     "description": "A list of patterns for cargo-watch to ignore (will be passed as `--ignore`)",
                     "default": []
                 },
+                "rust-analyzer.cargo-watch.allTargets": {
+                    "type": "boolean",
+                    "description": "Check all targets and tests (will be passed as `--all-targets`)",
+                    "default": true
+                },
                 "rust-analyzer.trace.server": {
                     "type": "string",
                     "scope": "window",
@@ -338,6 +347,21 @@
                     "type": "number",
                     "default": 20,
                     "description": "Maximum length for inlay hints"
+                },
+                "rust-analyzer.cargoFeatures.noDefaultFeatures": {
+                    "type": "boolean",
+                    "default": false,
+                    "description": "Do not activate the `default` feature"
+                },
+                "rust-analyzer.cargoFeatures.allFeatures": {
+                    "type": "boolean",
+                    "default": true,
+                    "description": "Activate all available features"
+                },
+                "rust-analyzer.cargoFeatures.features": {
+                    "type": "array",
+                    "default": [],
+                    "description": "List of features to activate"
                 }
             }
         },
@@ -358,6 +382,20 @@
                         "column": 3
                     }
                 ]
+            },
+            {
+                "name": "rustc-json",
+                "patterns": [
+                    {
+                        "regexp": "^.*\"message\":{\"message\":\"([^\"]*).*?\"file_name\":\"([^\"]+).*?\"line_start\":(\\d+).*?\"line_end\":(\\d+).*?\"column_start\":(\\d+).*?\"column_end\":(\\d+).*}$",
+                        "message": 1,
+                        "file": 2,
+                        "line": 3,
+                        "endLine": 4,
+                        "column": 5,
+                        "endColumn": 6
+                    }
+                ]
             }
         ],
         "problemMatchers": [
@@ -370,6 +408,14 @@
                 "pattern": "$rustc"
             },
             {
+                "name": "rustc-json",
+                "fileLocation": [
+                    "relative",
+                    "${workspaceRoot}"
+                ],
+                "pattern": "$rustc-json"
+            },
+            {
                 "name": "rustc-watch",
                 "fileLocation": [
                     "relative",
@@ -483,6 +529,33 @@
                 }
             },
             {
+                "id": "ralsp.literal.numeric",
+                "description": "Color for numeric literals",
+                "defaults": {
+                    "dark": "#BECEA8",
+                    "light": "#09885A",
+                    "highContrast": "#B5CEA8"
+                }
+            },
+            {
+                "id": "ralsp.literal.char",
+                "description": "Color for character literals",
+                "defaults": {
+                    "dark": "#BECEA8",
+                    "light": "#09885A",
+                    "highContrast": "#B5CEA8"
+                }
+            },
+            {
+                "id": "ralsp.literal.byte",
+                "description": "Color for byte literals",
+                "defaults": {
+                    "dark": "#BECEA8",
+                    "light": "#09885A",
+                    "highContrast": "#B5CEA8"
+                }
+            },
+            {
                 "id": "ralsp.macro",
                 "description": "Color for macros",
                 "defaults": {
@@ -502,7 +575,43 @@
             },
             {
                 "id": "ralsp.type",
-                "description": "Color for types",
+                "description": "Color for other types (traits, aliases..)",
+                "defaults": {
+                    "dark": "#4EC9B0",
+                    "light": "#267F99",
+                    "highContrast": "#4EC9B0"
+                }
+            },
+            {
+                "id": "ralsp.type.builtin",
+                "description": "Color for built-in types (&str, bool, u16, u32)",
+                "defaults": {
+                    "dark": "#4EC9B0",
+                    "light": "#267F99",
+                    "highContrast": "#4EC9B0"
+                }
+            },
+            {
+                "id": "ralsp.type.lifetime",
+                "description": "Color for lifetimes parameters",
+                "defaults": {
+                    "dark": "#4EC9B0",
+                    "light": "#267F99",
+                    "highContrast": "#4EC9B0"
+                }
+            },
+            {
+                "id": "ralsp.type.self",
+                "description": "Color for `Self` param type",
+                "defaults": {
+                    "dark": "#4EC9B0",
+                    "light": "#267F99",
+                    "highContrast": "#4EC9B0"
+                }
+            },
+            {
+                "id": "ralsp.type.param",
+                "description": "Color for type parameters",
                 "defaults": {
                     "dark": "#4EC9B0",
                     "light": "#267F99",
diff --git a/editors/code/rollup.config.js b/editors/code/rollup.config.js
index a023b8c3f..1b222bbe7 100644
--- a/editors/code/rollup.config.js
+++ b/editors/code/rollup.config.js
@@ -1,12 +1,14 @@
 import typescript from 'rollup-plugin-typescript';
 import resolve from 'rollup-plugin-node-resolve';
 import commonjs from 'rollup-plugin-commonjs';
+import sourcemaps from 'rollup-plugin-sourcemaps'
 import nodeBuiltins from 'builtin-modules';
 
 export default {
     input: './src/extension.ts',
     plugins: [
         typescript(),
+        sourcemaps(),
         resolve(),
         commonjs({
             namedExports: {
@@ -22,6 +24,7 @@ export default {
     ],
     output: {
         file: './bundle/extension.js',
+        sourcemap: true,
         format: 'cjs',
     }
 };
diff --git a/editors/code/src/commands/analyzer_status.ts b/editors/code/src/commands/analyzer_status.ts
index 63f82c92d..2777ced24 100644
--- a/editors/code/src/commands/analyzer_status.ts
+++ b/editors/code/src/commands/analyzer_status.ts
@@ -9,7 +9,7 @@ export class TextDocumentContentProvider
     public syntaxTree: string = 'Not available';
 
     public provideTextDocumentContent(
-        uri: vscode.Uri
+        _uri: vscode.Uri,
     ): vscode.ProviderResult<string> {
         const editor = vscode.window.activeTextEditor;
         if (editor == null) {
@@ -17,7 +17,7 @@ export class TextDocumentContentProvider
         }
         return Server.client.sendRequest<string>(
             'rust-analyzer/analyzerStatus',
-            null
+            null,
         );
     }
 
@@ -35,8 +35,8 @@ export function makeCommand(context: vscode.ExtensionContext) {
     context.subscriptions.push(
         vscode.workspace.registerTextDocumentContentProvider(
             'rust-analyzer-status',
-            textDocumentContentProvider
-        )
+            textDocumentContentProvider,
+        ),
     );
 
     context.subscriptions.push({
@@ -44,21 +44,21 @@ export function makeCommand(context: vscode.ExtensionContext) {
             if (poller != null) {
                 clearInterval(poller);
             }
-        }
+        },
     });
 
     return async function handle() {
         if (poller == null) {
             poller = setInterval(
                 () => textDocumentContentProvider.eventEmitter.fire(statusUri),
-                1000
+                1000,
             );
         }
         const document = await vscode.workspace.openTextDocument(statusUri);
         return vscode.window.showTextDocument(
             document,
             vscode.ViewColumn.Two,
-            true
+            true,
         );
     };
 }
diff --git a/editors/code/src/commands/apply_source_change.ts b/editors/code/src/commands/apply_source_change.ts
index dcd074b8b..8167398b1 100644
--- a/editors/code/src/commands/apply_source_change.ts
+++ b/editors/code/src/commands/apply_source_change.ts
@@ -11,7 +11,7 @@ export interface SourceChange {
 
 export async function handle(change: SourceChange) {
     const wsEdit = Server.client.protocol2CodeConverter.asWorkspaceEdit(
-        change.workspaceEdit
+        change.workspaceEdit,
     );
     let created;
     let moved;
@@ -33,10 +33,10 @@ export async function handle(change: SourceChange) {
         await vscode.window.showTextDocument(doc);
     } else if (toReveal) {
         const uri = Server.client.protocol2CodeConverter.asUri(
-            toReveal.textDocument.uri
+            toReveal.textDocument.uri,
         );
         const position = Server.client.protocol2CodeConverter.asPosition(
-            toReveal.position
+            toReveal.position,
         );
         const editor = vscode.window.activeTextEditor;
         if (!editor || editor.document.uri.toString() !== uri.toString()) {
@@ -48,7 +48,7 @@ export async function handle(change: SourceChange) {
         editor.selection = new vscode.Selection(position, position);
         editor.revealRange(
             new vscode.Range(position, position),
-            vscode.TextEditorRevealType.Default
+            vscode.TextEditorRevealType.Default,
         );
     }
 }
diff --git a/editors/code/src/commands/cargo_watch.ts b/editors/code/src/commands/cargo_watch.ts
index 59d4ba97a..ac62bdd48 100644
--- a/editors/code/src/commands/cargo_watch.ts
+++ b/editors/code/src/commands/cargo_watch.ts
@@ -9,13 +9,13 @@ import { StatusDisplay } from './watch_status';
 
 import {
     mapRustDiagnosticToVsCode,
-    RustDiagnostic
+    RustDiagnostic,
 } from '../utils/diagnostics/rust';
 import SuggestedFixCollection from '../utils/diagnostics/SuggestedFixCollection';
 import { areDiagnosticsEqual } from '../utils/diagnostics/vscode';
 
 export async function registerCargoWatchProvider(
-    subscriptions: vscode.Disposable[]
+    subscriptions: vscode.Disposable[],
 ): Promise<CargoWatchProvider | undefined> {
     let cargoExists = false;
 
@@ -30,7 +30,7 @@ export async function registerCargoWatchProvider(
 
     if (!cargoExists) {
         vscode.window.showErrorMessage(
-            `Couldn\'t find \'Cargo.toml\' at ${cargoTomlPath}`
+            `Couldn\'t find \'Cargo.toml\' at ${cargoTomlPath}`,
         );
         return;
     }
@@ -52,13 +52,13 @@ export class CargoWatchProvider implements vscode.Disposable {
 
     constructor() {
         this.diagnosticCollection = vscode.languages.createDiagnosticCollection(
-            'rustc'
+            'rustc',
         );
         this.statusDisplay = new StatusDisplay(
-            Server.config.cargoWatchOptions.command
+            Server.config.cargoWatchOptions.command,
         );
         this.outputChannel = vscode.window.createOutputChannel(
-            'Cargo Watch Trace'
+            'Cargo Watch Trace',
         );
 
         // Track `rustc`'s suggested fixes so we can convert them to code actions
@@ -68,22 +68,24 @@ export class CargoWatchProvider implements vscode.Disposable {
             this.suggestedFixCollection,
             {
                 providedCodeActionKinds:
-                    SuggestedFixCollection.PROVIDED_CODE_ACTION_KINDS
-            }
+                    SuggestedFixCollection.PROVIDED_CODE_ACTION_KINDS,
+            },
         );
     }
 
     public start() {
         if (this.cargoProcess) {
             vscode.window.showInformationMessage(
-                'Cargo Watch is already running'
+                'Cargo Watch is already running',
             );
             return;
         }
 
         let args =
-            Server.config.cargoWatchOptions.command +
-            ' --all-targets --message-format json';
+            Server.config.cargoWatchOptions.command + ' --message-format json';
+        if (Server.config.cargoWatchOptions.allTargets) {
+            args += ' --all-targets';
+        }
         if (Server.config.cargoWatchOptions.command.length > 0) {
             // Excape the double quote string:
             args += ' ' + Server.config.cargoWatchOptions.arguments;
@@ -95,7 +97,7 @@ export class CargoWatchProvider implements vscode.Disposable {
 
         const ignoreFlags = Server.config.cargoWatchOptions.ignore.reduce(
             (flags, pattern) => [...flags, '--ignore', pattern],
-            [] as string[]
+            [] as string[],
         );
 
         // Start the cargo watch with json message
@@ -105,12 +107,17 @@ export class CargoWatchProvider implements vscode.Disposable {
             {
                 stdio: ['ignore', 'pipe', 'pipe'],
                 cwd: vscode.workspace.rootPath,
-                windowsVerbatimArguments: true
-            }
+                windowsVerbatimArguments: true,
+            },
         );
 
+        if (!this.cargoProcess) {
+            vscode.window.showErrorMessage('Cargo Watch failed to start');
+            return;
+        }
+
         const stdoutData = new LineBuffer();
-        this.cargoProcess.stdout.on('data', (s: string) => {
+        this.cargoProcess.stdout?.on('data', (s: string) => {
             stdoutData.processOutput(s, line => {
                 this.logInfo(line);
                 try {
@@ -122,7 +129,7 @@ export class CargoWatchProvider implements vscode.Disposable {
         });
 
         const stderrData = new LineBuffer();
-        this.cargoProcess.stderr.on('data', (s: string) => {
+        this.cargoProcess.stderr?.on('data', (s: string) => {
             stderrData.processOutput(s, line => {
                 this.logError('Error on cargo-watch : {\n' + line + '}\n');
             });
@@ -130,7 +137,7 @@ export class CargoWatchProvider implements vscode.Disposable {
 
         this.cargoProcess.on('error', (err: Error) => {
             this.logError(
-                'Error on cargo-watch process : {\n' + err.message + '}\n'
+                'Error on cargo-watch process : {\n' + err.message + '}\n',
             );
         });
 
@@ -223,12 +230,12 @@ export class CargoWatchProvider implements vscode.Disposable {
             const fileUri = location.uri;
 
             const diagnostics: vscode.Diagnostic[] = [
-                ...(this.diagnosticCollection!.get(fileUri) || [])
+                ...(this.diagnosticCollection!.get(fileUri) || []),
             ];
 
             // If we're building multiple targets it's possible we've already seen this diagnostic
             const isDuplicate = diagnostics.some(d =>
-                areDiagnosticsEqual(d, diagnostic)
+                areDiagnosticsEqual(d, diagnostic),
             );
             if (isDuplicate) {
                 return;
@@ -241,7 +248,7 @@ export class CargoWatchProvider implements vscode.Disposable {
                 for (const suggestedFix of suggestedFixes) {
                     this.suggestedFixCollection.addSuggestedFixForDiagnostic(
                         suggestedFix,
-                        diagnostic
+                        diagnostic,
                     );
                 }
 
@@ -249,7 +256,7 @@ export class CargoWatchProvider implements vscode.Disposable {
                 vscode.commands.executeCommand(
                     'vscode.executeCodeActionProvider',
                     fileUri,
-                    diagnostic.range
+                    diagnostic.range,
                 );
             }
         }
diff --git a/editors/code/src/commands/expand_macro.ts b/editors/code/src/commands/expand_macro.ts
index 34e0c8fb3..17c78280a 100644
--- a/editors/code/src/commands/expand_macro.ts
+++ b/editors/code/src/commands/expand_macro.ts
@@ -3,7 +3,7 @@ import { Position, TextDocumentIdentifier } from 'vscode-languageclient';
 import { Server } from '../server';
 
 export const expandMacroUri = vscode.Uri.parse(
-    'rust-analyzer://expandMacro/[EXPANSION].rs'
+    'rust-analyzer://expandMacro/[EXPANSION].rs',
 );
 
 export class ExpandMacroContentProvider
@@ -11,7 +11,7 @@ export class ExpandMacroContentProvider
     public eventEmitter = new vscode.EventEmitter<vscode.Uri>();
 
     public provideTextDocumentContent(
-        uri: vscode.Uri
+        _uri: vscode.Uri,
     ): vscode.ProviderResult<string> {
         async function handle() {
             const editor = vscode.window.activeTextEditor;
@@ -22,11 +22,11 @@ export class ExpandMacroContentProvider
             const position = editor.selection.active;
             const request: MacroExpandParams = {
                 textDocument: { uri: editor.document.uri.toString() },
-                position
+                position,
             };
             const expanded = await Server.client.sendRequest<ExpandedMacro>(
                 'rust-analyzer/expandMacro',
-                request
+                request,
             );
 
             if (expanded == null) {
@@ -58,7 +58,7 @@ export function createHandle(provider: ExpandMacroContentProvider) {
         return vscode.window.showTextDocument(
             document,
             vscode.ViewColumn.Two,
-            true
+            true,
         );
     };
 }
diff --git a/editors/code/src/commands/index.ts b/editors/code/src/commands/index.ts
index 2ade6d331..13a696758 100644
--- a/editors/code/src/commands/index.ts
+++ b/editors/code/src/commands/index.ts
@@ -19,5 +19,5 @@ export {
     runnables,
     syntaxTree,
     onEnter,
-    inlayHints
+    inlayHints,
 };
diff --git a/editors/code/src/commands/inlay_hints.ts b/editors/code/src/commands/inlay_hints.ts
index 0dbdd94fb..ac7dcce60 100644
--- a/editors/code/src/commands/inlay_hints.ts
+++ b/editors/code/src/commands/inlay_hints.ts
@@ -15,8 +15,8 @@ interface InlayHint {
 
 const typeHintDecorationType = vscode.window.createTextEditorDecorationType({
     after: {
-        color: new vscode.ThemeColor('ralsp.inlayHint')
-    }
+        color: new vscode.ThemeColor('ralsp.inlayHint'),
+    },
 });
 
 export class HintsUpdater {
@@ -26,13 +26,13 @@ export class HintsUpdater {
         if (this.displayHints !== displayHints) {
             this.displayHints = displayHints;
             return this.refreshVisibleEditorsHints(
-                displayHints ? undefined : []
+                displayHints ? undefined : [],
             );
         }
     }
 
     public async refreshHintsForVisibleEditors(
-        cause?: TextDocumentChangeEvent
+        cause?: TextDocumentChangeEvent,
     ): Promise<void> {
         if (!this.displayHints) {
             return;
@@ -48,21 +48,21 @@ export class HintsUpdater {
     }
 
     private async refreshVisibleEditorsHints(
-        newDecorations?: vscode.DecorationOptions[]
+        newDecorations?: vscode.DecorationOptions[],
     ) {
         const promises: Array<Promise<void>> = [];
 
         for (const rustEditor of vscode.window.visibleTextEditors.filter(
-            editor => this.isRustDocument(editor.document)
+            editor => this.isRustDocument(editor.document),
         )) {
             if (newDecorations !== undefined) {
                 promises.push(
                     Promise.resolve(
                         rustEditor.setDecorations(
                             typeHintDecorationType,
-                            newDecorations
-                        )
-                    )
+                            newDecorations,
+                        ),
+                    ),
                 );
             } else {
                 promises.push(this.updateDecorationsFromServer(rustEditor));
@@ -79,7 +79,7 @@ export class HintsUpdater {
     }
 
     private async updateDecorationsFromServer(
-        editor: TextEditor
+        editor: TextEditor,
     ): Promise<void> {
         const newHints = await this.queryHints(editor.document.uri.toString());
         if (newHints !== null) {
@@ -87,20 +87,20 @@ export class HintsUpdater {
                 range: hint.range,
                 renderOptions: {
                     after: {
-                        contentText: `: ${hint.label}`
-                    }
-                }
+                        contentText: `: ${hint.label}`,
+                    },
+                },
             }));
             return editor.setDecorations(
                 typeHintDecorationType,
-                newDecorations
+                newDecorations,
             );
         }
     }
 
     private async queryHints(documentUri: string): Promise<InlayHint[] | null> {
         const request: InlayHintsParams = {
-            textDocument: { uri: documentUri }
+            textDocument: { uri: documentUri },
         };
         const client = Server.client;
         return client
@@ -108,8 +108,8 @@ export class HintsUpdater {
             .then(() =>
                 client.sendRequest<InlayHint[] | null>(
                     'rust-analyzer/inlayHints',
-                    request
-                )
+                    request,
+                ),
             );
     }
 }
diff --git a/editors/code/src/commands/join_lines.ts b/editors/code/src/commands/join_lines.ts
index 0d4b12f4d..134ddc801 100644
--- a/editors/code/src/commands/join_lines.ts
+++ b/editors/code/src/commands/join_lines.ts
@@ -4,7 +4,7 @@ import { Range, TextDocumentIdentifier } from 'vscode-languageclient';
 import { Server } from '../server';
 import {
     handle as applySourceChange,
-    SourceChange
+    SourceChange,
 } from './apply_source_change';
 
 interface JoinLinesParams {
@@ -19,11 +19,11 @@ export async function handle() {
     }
     const request: JoinLinesParams = {
         range: Server.client.code2ProtocolConverter.asRange(editor.selection),
-        textDocument: { uri: editor.document.uri.toString() }
+        textDocument: { uri: editor.document.uri.toString() },
     };
     const change = await Server.client.sendRequest<SourceChange>(
         'rust-analyzer/joinLines',
-        request
+        request,
     );
     await applySourceChange(change);
 }
diff --git a/editors/code/src/commands/matching_brace.ts b/editors/code/src/commands/matching_brace.ts
index d86faf405..364208cc7 100644
--- a/editors/code/src/commands/matching_brace.ts
+++ b/editors/code/src/commands/matching_brace.ts
@@ -17,15 +17,15 @@ export async function handle() {
         textDocument: { uri: editor.document.uri.toString() },
         offsets: editor.selections.map(s => {
             return Server.client.code2ProtocolConverter.asPosition(s.active);
-        })
+        }),
     };
     const response = await Server.client.sendRequest<Position[]>(
         'rust-analyzer/findMatchingBrace',
-        request
+        request,
     );
     editor.selections = editor.selections.map((sel, idx) => {
         const active = Server.client.protocol2CodeConverter.asPosition(
-            response[idx]
+            response[idx],
         );
         const anchor = sel.isEmpty ? active : sel.anchor;
         return new vscode.Selection(anchor, active);
diff --git a/editors/code/src/commands/on_enter.ts b/editors/code/src/commands/on_enter.ts
index 16dcb70c8..772c64b3c 100644
--- a/editors/code/src/commands/on_enter.ts
+++ b/editors/code/src/commands/on_enter.ts
@@ -3,7 +3,7 @@ import * as lc from 'vscode-languageclient';
 import { Server } from '../server';
 import {
     handle as applySourceChange,
-    SourceChange
+    SourceChange,
 } from './apply_source_change';
 
 export async function handle(event: { text: string }): Promise<boolean> {
@@ -18,12 +18,12 @@ export async function handle(event: { text: string }): Promise<boolean> {
     const request: lc.TextDocumentPositionParams = {
         textDocument: { uri: editor.document.uri.toString() },
         position: Server.client.code2ProtocolConverter.asPosition(
-            editor.selection.active
-        )
+            editor.selection.active,
+        ),
     };
     const change = await Server.client.sendRequest<undefined | SourceChange>(
         'rust-analyzer/onEnter',
-        request
+        request,
     );
     if (!change) {
         return false;
diff --git a/editors/code/src/commands/parent_module.ts b/editors/code/src/commands/parent_module.ts
index 9d30b7b59..ad49e1bdb 100644
--- a/editors/code/src/commands/parent_module.ts
+++ b/editors/code/src/commands/parent_module.ts
@@ -11,12 +11,12 @@ export async function handle() {
     const request: lc.TextDocumentPositionParams = {
         textDocument: { uri: editor.document.uri.toString() },
         position: Server.client.code2ProtocolConverter.asPosition(
-            editor.selection.active
-        )
+            editor.selection.active,
+        ),
     };
     const response = await Server.client.sendRequest<lc.Location[]>(
         'rust-analyzer/parentModule',
-        request
+        request,
     );
     const loc = response[0];
     if (loc == null) {
diff --git a/editors/code/src/commands/runnables.ts b/editors/code/src/commands/runnables.ts
index ac59bf60d..cf980e257 100644
--- a/editors/code/src/commands/runnables.ts
+++ b/editors/code/src/commands/runnables.ts
@@ -46,17 +46,17 @@ function createTask(spec: Runnable): vscode.Task {
         label: spec.label,
         command: spec.bin,
         args: spec.args,
-        env: spec.env
+        env: spec.env,
     };
 
     const execOption: vscode.ShellExecutionOptions = {
         cwd: spec.cwd || '.',
-        env: definition.env
+        env: definition.env,
     };
     const exec = new vscode.ShellExecution(
         definition.command,
         definition.args,
-        execOption
+        execOption,
     );
 
     const f = vscode.workspace.workspaceFolders![0];
@@ -66,30 +66,30 @@ function createTask(spec: Runnable): vscode.Task {
         definition.label,
         TASK_SOURCE,
         exec,
-        ['$rustc']
+        ['$rustc'],
     );
     t.presentationOptions.clear = true;
     return t;
 }
 
 let prevRunnable: RunnableQuickPick | undefined;
-export async function handle() {
+export async function handle(): Promise<vscode.TaskExecution | undefined> {
     const editor = vscode.window.activeTextEditor;
     if (editor == null || editor.document.languageId !== 'rust') {
         return;
     }
     const textDocument: lc.TextDocumentIdentifier = {
-        uri: editor.document.uri.toString()
+        uri: editor.document.uri.toString(),
     };
     const params: RunnablesParams = {
         textDocument,
         position: Server.client.code2ProtocolConverter.asPosition(
-            editor.selection.active
-        )
+            editor.selection.active,
+        ),
     };
     const runnables = await Server.client.sendRequest<Runnable[]>(
         'rust-analyzer/runnables',
-        params
+        params,
     );
     const items: RunnableQuickPick[] = [];
     if (prevRunnable) {
@@ -105,12 +105,14 @@ export async function handle() {
         items.push(new RunnableQuickPick(r));
     }
     const item = await vscode.window.showQuickPick(items);
-    if (item) {
-        item.detail = 'rerun';
-        prevRunnable = item;
-        const task = createTask(item.runnable);
-        return await vscode.tasks.executeTask(task);
+    if (!item) {
+        return;
     }
+
+    item.detail = 'rerun';
+    prevRunnable = item;
+    const task = createTask(item.runnable);
+    return await vscode.tasks.executeTask(task);
 }
 
 export async function handleSingle(runnable: Runnable) {
@@ -124,7 +126,7 @@ export async function handleSingle(runnable: Runnable) {
     task.presentationOptions = {
         reveal: vscode.TaskRevealKind.Always,
         panel: vscode.TaskPanelKind.Dedicated,
-        clear: true
+        clear: true,
     };
 
     return vscode.tasks.executeTask(task);
@@ -136,7 +138,7 @@ export async function handleSingle(runnable: Runnable) {
  * that, when accepted, allow us to `cargo install cargo-watch` and then run it.
  */
 export async function interactivelyStartCargoWatch(
-    context: vscode.ExtensionContext
+    context: vscode.ExtensionContext,
 ): Promise<CargoWatchProvider | undefined> {
     if (Server.config.cargoWatchOptions.enableOnStartup === 'disabled') {
         return;
@@ -146,7 +148,7 @@ export async function interactivelyStartCargoWatch(
         const watch = await vscode.window.showInformationMessage(
             'Start watching changes with cargo? (Executes `cargo watch`, provides inline diagnostics)',
             'yes',
-            'no'
+            'no',
         );
         if (watch !== 'yes') {
             return;
@@ -157,12 +159,12 @@ export async function interactivelyStartCargoWatch(
 }
 
 export async function startCargoWatch(
-    context: vscode.ExtensionContext
+    context: vscode.ExtensionContext,
 ): Promise<CargoWatchProvider | undefined> {
     const execPromise = util.promisify(child_process.exec);
 
     const { stderr, code = 0 } = await execPromise(
-        'cargo watch --version'
+        'cargo watch --version',
     ).catch(e => e);
 
     if (stderr.includes('no such subcommand: `watch`')) {
@@ -171,14 +173,14 @@ export async function startCargoWatch(
         const install = await vscode.window.showInformationMessage(
             msg,
             'yes',
-            'no'
+            'no',
         );
         if (install !== 'yes') {
             return;
         }
 
         const label = 'install-cargo-watch';
-        const taskFinished = new Promise((resolve, reject) => {
+        const taskFinished = new Promise((resolve, _reject) => {
             const disposable = vscode.tasks.onDidEndTask(({ execution }) => {
                 if (execution.task.name === label) {
                     disposable.dispose();
@@ -192,20 +194,20 @@ export async function startCargoWatch(
                 label,
                 bin: 'cargo',
                 args: ['install', 'cargo-watch'],
-                env: {}
-            })
+                env: {},
+            }),
         );
         await taskFinished;
         const output = await execPromise('cargo watch --version').catch(e => e);
         if (output.stderr !== '') {
             vscode.window.showErrorMessage(
-                `Couldn't install \`cargo-\`watch: ${output.stderr}`
+                `Couldn't install \`cargo-\`watch: ${output.stderr}`,
             );
             return;
         }
     } else if (code !== 0) {
         vscode.window.showErrorMessage(
-            `\`cargo watch\` failed with ${code}: ${stderr}`
+            `\`cargo watch\` failed with ${code}: ${stderr}`,
         );
         return;
     }
diff --git a/editors/code/src/commands/syntaxTree.ts b/editors/code/src/commands/syntaxTree.ts
index 2f50fe14b..89a80550c 100644
--- a/editors/code/src/commands/syntaxTree.ts
+++ b/editors/code/src/commands/syntaxTree.ts
@@ -11,7 +11,7 @@ export class SyntaxTreeContentProvider
     public syntaxTree: string = 'Not available';
 
     public provideTextDocumentContent(
-        uri: vscode.Uri
+        uri: vscode.Uri,
     ): vscode.ProviderResult<string> {
         const editor = vscode.window.activeTextEditor;
         if (editor == null) {
@@ -25,17 +25,17 @@ export class SyntaxTreeContentProvider
             range = editor.selection.isEmpty
                 ? undefined
                 : Server.client.code2ProtocolConverter.asRange(
-                      editor.selection
+                      editor.selection,
                   );
         }
 
         const request: SyntaxTreeParams = {
             textDocument: { uri: editor.document.uri.toString() },
-            range
+            range,
         };
         return Server.client.sendRequest<SyntaxTreeResult>(
             'rust-analyzer/syntaxTree',
-            request
+            request,
         );
     }
 
@@ -70,7 +70,7 @@ export function createHandle(provider: SyntaxTreeContentProvider) {
         return vscode.window.showTextDocument(
             document,
             vscode.ViewColumn.Two,
-            true
+            true,
         );
     };
 }
diff --git a/editors/code/src/commands/watch_status.ts b/editors/code/src/commands/watch_status.ts
index 6c1f9041b..8d64394c7 100644
--- a/editors/code/src/commands/watch_status.ts
+++ b/editors/code/src/commands/watch_status.ts
@@ -13,7 +13,7 @@ export class StatusDisplay implements vscode.Disposable {
     constructor(command: string) {
         this.statusBarItem = vscode.window.createStatusBarItem(
             vscode.StatusBarAlignment.Left,
-            10
+            10,
         );
         this.command = command;
         this.statusBarItem.hide();
diff --git a/editors/code/src/config.ts b/editors/code/src/config.ts
index 4cedbea46..c06dddb1c 100644
--- a/editors/code/src/config.ts
+++ b/editors/code/src/config.ts
@@ -14,6 +14,13 @@ export interface CargoWatchOptions {
     command: string;
     trace: CargoWatchTraceOptions;
     ignore: string[];
+    allTargets: boolean;
+}
+
+export interface CargoFeatures {
+    noDefaultFeatures: boolean;
+    allFeatures: boolean;
+    features: string[];
 }
 
 export class Config {
@@ -25,21 +32,30 @@ export class Config {
     public displayInlayHints = true;
     public maxInlayHintLength: null | number = null;
     public excludeGlobs = [];
-    public useClientWatching = false;
+    public useClientWatching = true;
     public featureFlags = {};
+    // for internal use
+    public withSysroot: null | boolean = null;
     public cargoWatchOptions: CargoWatchOptions = {
         enableOnStartup: 'ask',
         trace: 'off',
         arguments: '',
         command: '',
-        ignore: []
+        ignore: [],
+        allTargets: true,
+    };
+    public cargoFeatures: CargoFeatures = {
+        noDefaultFeatures: false,
+        allFeatures: true,
+        features: [],
     };
 
     private prevEnhancedTyping: null | boolean = null;
+    private prevCargoFeatures: null | CargoFeatures = null;
 
     constructor() {
         vscode.workspace.onDidChangeConfiguration(_ =>
-            this.userConfigChanged()
+            this.userConfigChanged(),
         );
         this.userConfigChanged();
     }
@@ -49,6 +65,8 @@ export class Config {
 
         Server.highlighter.removeHighlights();
 
+        let requireReloadMessage = null;
+
         if (config.has('highlightingOn')) {
             this.highlightingOn = config.get('highlightingOn') as boolean;
             if (this.highlightingOn) {
@@ -59,13 +77,13 @@ export class Config {
 
         if (config.has('rainbowHighlightingOn')) {
             this.rainbowHighlightingOn = config.get(
-                'rainbowHighlightingOn'
+                'rainbowHighlightingOn',
             ) as boolean;
         }
 
         if (config.has('enableEnhancedTyping')) {
             this.enableEnhancedTyping = config.get(
-                'enableEnhancedTyping'
+                'enableEnhancedTyping',
             ) as boolean;
 
             if (this.prevEnhancedTyping === null) {
@@ -76,19 +94,8 @@ export class Config {
         }
 
         if (this.prevEnhancedTyping !== this.enableEnhancedTyping) {
-            const reloadAction = 'Reload now';
-            vscode.window
-                .showInformationMessage(
-                    'Changing enhanced typing setting requires a reload',
-                    reloadAction
-                )
-                .then(selectedAction => {
-                    if (selectedAction === reloadAction) {
-                        vscode.commands.executeCommand(
-                            'workbench.action.reloadWindow'
-                        );
-                    }
-                });
+            requireReloadMessage =
+                'Changing enhanced typing setting requires a reload';
             this.prevEnhancedTyping = this.enableEnhancedTyping;
         }
 
@@ -106,28 +113,35 @@ export class Config {
         if (config.has('trace.cargo-watch')) {
             this.cargoWatchOptions.trace = config.get<CargoWatchTraceOptions>(
                 'trace.cargo-watch',
-                'off'
+                'off',
             );
         }
 
         if (config.has('cargo-watch.arguments')) {
             this.cargoWatchOptions.arguments = config.get<string>(
                 'cargo-watch.arguments',
-                ''
+                '',
             );
         }
 
         if (config.has('cargo-watch.command')) {
             this.cargoWatchOptions.command = config.get<string>(
                 'cargo-watch.command',
-                ''
+                '',
             );
         }
 
         if (config.has('cargo-watch.ignore')) {
             this.cargoWatchOptions.ignore = config.get<string[]>(
                 'cargo-watch.ignore',
-                []
+                [],
+            );
+        }
+
+        if (config.has('cargo-watch.allTargets')) {
+            this.cargoWatchOptions.allTargets = config.get<boolean>(
+                'cargo-watch.allTargets',
+                true,
             );
         }
 
@@ -140,17 +154,68 @@ export class Config {
         }
         if (config.has('maxInlayHintLength')) {
             this.maxInlayHintLength = config.get(
-                'maxInlayHintLength'
+                'maxInlayHintLength',
             ) as number;
         }
         if (config.has('excludeGlobs')) {
             this.excludeGlobs = config.get('excludeGlobs') || [];
         }
         if (config.has('useClientWatching')) {
-            this.useClientWatching = config.get('useClientWatching') || false;
+            this.useClientWatching = config.get('useClientWatching') || true;
         }
         if (config.has('featureFlags')) {
             this.featureFlags = config.get('featureFlags') || {};
         }
+        if (config.has('withSysroot')) {
+            this.withSysroot = config.get('withSysroot') || false;
+        }
+
+        if (config.has('cargoFeatures.noDefaultFeatures')) {
+            this.cargoFeatures.noDefaultFeatures = config.get(
+                'cargoFeatures.noDefaultFeatures',
+                false,
+            );
+        }
+        if (config.has('cargoFeatures.allFeatures')) {
+            this.cargoFeatures.allFeatures = config.get(
+                'cargoFeatures.allFeatures',
+                true,
+            );
+        }
+        if (config.has('cargoFeatures.features')) {
+            this.cargoFeatures.features = config.get(
+                'cargoFeatures.features',
+                [],
+            );
+        }
+
+        if (
+            this.prevCargoFeatures !== null &&
+            (this.cargoFeatures.allFeatures !==
+                this.prevCargoFeatures.allFeatures ||
+                this.cargoFeatures.noDefaultFeatures !==
+                    this.prevCargoFeatures.noDefaultFeatures ||
+                this.cargoFeatures.features.length !==
+                    this.prevCargoFeatures.features.length ||
+                this.cargoFeatures.features.some(
+                    (v, i) => v !== this.prevCargoFeatures!.features[i],
+                ))
+        ) {
+            requireReloadMessage = 'Changing cargo features requires a reload';
+        }
+        this.prevCargoFeatures = { ...this.cargoFeatures };
+
+        if (requireReloadMessage !== null) {
+            const reloadAction = 'Reload now';
+            vscode.window
+                .showInformationMessage(requireReloadMessage, reloadAction)
+                .then(selectedAction => {
+                    if (selectedAction === reloadAction) {
+                        vscode.commands.executeCommand(
+                            'workbench.action.reloadWindow',
+                        );
+                    }
+                });
+        }
     }
 }
diff --git a/editors/code/src/events/change_active_text_editor.ts b/editors/code/src/events/change_active_text_editor.ts
index 64be56225..74b91bd48 100644
--- a/editors/code/src/events/change_active_text_editor.ts
+++ b/editors/code/src/events/change_active_text_editor.ts
@@ -3,7 +3,7 @@ import { TextDocumentIdentifier } from 'vscode-languageclient';
 
 import {
     SyntaxTreeContentProvider,
-    syntaxTreeUri
+    syntaxTreeUri,
 } from '../commands/syntaxTree';
 import { Decoration } from '../highlighting';
 import { Server } from '../server';
@@ -21,11 +21,11 @@ export function makeHandler(syntaxTreeProvider: SyntaxTreeContentProvider) {
         }
 
         const params: TextDocumentIdentifier = {
-            uri: editor.document.uri.toString()
+            uri: editor.document.uri.toString(),
         };
         const decorations = await Server.client.sendRequest<Decoration[]>(
             'rust-analyzer/decorationsRequest',
-            params
+            params,
         );
         Server.highlighter.setHighlights(editor, decorations);
     };
diff --git a/editors/code/src/events/change_text_document.ts b/editors/code/src/events/change_text_document.ts
index 89488bc61..2e998e889 100644
--- a/editors/code/src/events/change_text_document.ts
+++ b/editors/code/src/events/change_text_document.ts
@@ -2,7 +2,7 @@ import * as vscode from 'vscode';
 
 import {
     SyntaxTreeContentProvider,
-    syntaxTreeUri
+    syntaxTreeUri,
 } from '../commands/syntaxTree';
 
 export function createHandler(syntaxTreeProvider: SyntaxTreeContentProvider) {
diff --git a/editors/code/src/extension.ts b/editors/code/src/extension.ts
index 683497dfd..815f3692c 100644
--- a/editors/code/src/extension.ts
+++ b/editors/code/src/extension.ts
@@ -7,14 +7,14 @@ import { ExpandMacroContentProvider } from './commands/expand_macro';
 import { HintsUpdater } from './commands/inlay_hints';
 import {
     interactivelyStartCargoWatch,
-    startCargoWatch
+    startCargoWatch,
 } from './commands/runnables';
 import { SyntaxTreeContentProvider } from './commands/syntaxTree';
 import * as events from './events';
 import * as notifications from './notifications';
 import { Server } from './server';
 
-export function activate(context: vscode.ExtensionContext) {
+export async function activate(context: vscode.ExtensionContext) {
     function disposeOnDeactivation(disposable: vscode.Disposable) {
         context.subscriptions.push(disposable);
     }
@@ -24,7 +24,7 @@ export function activate(context: vscode.ExtensionContext) {
     }
     function overrideCommand(
         name: string,
-        f: (...args: any[]) => Promise<boolean>
+        f: (...args: any[]) => Promise<boolean>,
     ) {
         const defaultCmd = `default:${name}`;
         const original = (...args: any[]) =>
@@ -46,7 +46,7 @@ export function activate(context: vscode.ExtensionContext) {
             });
         } catch (_) {
             vscode.window.showWarningMessage(
-                'Enhanced typing feature is disabled because of incompatibility with VIM extension, consider turning off rust-analyzer.enableEnhancedTyping: https://github.com/rust-analyzer/rust-analyzer/blob/master/docs/user/README.md#settings'
+                'Enhanced typing feature is disabled because of incompatibility with VIM extension, consider turning off rust-analyzer.enableEnhancedTyping: https://github.com/rust-analyzer/rust-analyzer/blob/master/docs/user/README.md#settings',
             );
         }
     }
@@ -54,14 +54,14 @@ export function activate(context: vscode.ExtensionContext) {
     // Commands are requests from vscode to the language server
     registerCommand(
         'rust-analyzer.analyzerStatus',
-        commands.analyzerStatus.makeCommand(context)
+        commands.analyzerStatus.makeCommand(context),
     );
     registerCommand('rust-analyzer.collectGarbage', () =>
-        Server.client.sendRequest<null>('rust-analyzer/collectGarbage', null)
+        Server.client.sendRequest<null>('rust-analyzer/collectGarbage', null),
     );
     registerCommand(
         'rust-analyzer.matchingBrace',
-        commands.matchingBrace.handle
+        commands.matchingBrace.handle,
     );
     registerCommand('rust-analyzer.joinLines', commands.joinLines.handle);
     registerCommand('rust-analyzer.parentModule', commands.parentModule.handle);
@@ -70,7 +70,7 @@ export function activate(context: vscode.ExtensionContext) {
     registerCommand('rust-analyzer.runSingle', commands.runnables.handleSingle);
     registerCommand(
         'rust-analyzer.applySourceChange',
-        commands.applySourceChange.handle
+        commands.applySourceChange.handle,
     );
     registerCommand(
         'rust-analyzer.showReferences',
@@ -79,9 +79,9 @@ export function activate(context: vscode.ExtensionContext) {
                 'editor.action.showReferences',
                 vscode.Uri.parse(uri),
                 Server.client.protocol2CodeConverter.asPosition(position),
-                locations.map(Server.client.protocol2CodeConverter.asLocation)
+                locations.map(Server.client.protocol2CodeConverter.asLocation),
             );
-        }
+        },
     );
 
     if (Server.config.enableEnhancedTyping) {
@@ -89,48 +89,49 @@ export function activate(context: vscode.ExtensionContext) {
     }
 
     // Notifications are events triggered by the language server
-    const allNotifications: Iterable<
-        [string, lc.GenericNotificationHandler]
-    > = [
+    const allNotifications: Iterable<[
+        string,
+        lc.GenericNotificationHandler,
+    ]> = [
         [
             'rust-analyzer/publishDecorations',
-            notifications.publishDecorations.handle
-        ]
+            notifications.publishDecorations.handle,
+        ],
     ];
     const syntaxTreeContentProvider = new SyntaxTreeContentProvider();
     const expandMacroContentProvider = new ExpandMacroContentProvider();
 
     // The events below are plain old javascript events, triggered and handled by vscode
     vscode.window.onDidChangeActiveTextEditor(
-        events.changeActiveTextEditor.makeHandler(syntaxTreeContentProvider)
+        events.changeActiveTextEditor.makeHandler(syntaxTreeContentProvider),
     );
 
     disposeOnDeactivation(
         vscode.workspace.registerTextDocumentContentProvider(
             'rust-analyzer',
-            syntaxTreeContentProvider
-        )
+            syntaxTreeContentProvider,
+        ),
     );
     disposeOnDeactivation(
         vscode.workspace.registerTextDocumentContentProvider(
             'rust-analyzer',
-            expandMacroContentProvider
-        )
+            expandMacroContentProvider,
+        ),
     );
 
     registerCommand(
         'rust-analyzer.syntaxTree',
-        commands.syntaxTree.createHandle(syntaxTreeContentProvider)
+        commands.syntaxTree.createHandle(syntaxTreeContentProvider),
     );
     registerCommand(
         'rust-analyzer.expandMacro',
-        commands.expandMacro.createHandle(expandMacroContentProvider)
+        commands.expandMacro.createHandle(expandMacroContentProvider),
     );
 
     vscode.workspace.onDidChangeTextDocument(
         events.changeTextDocument.createHandler(syntaxTreeContentProvider),
         null,
-        context.subscriptions
+        context.subscriptions,
     );
 
     const startServer = () => Server.start(allNotifications);
@@ -159,7 +160,11 @@ export function activate(context: vscode.ExtensionContext) {
     });
 
     // Start the language server, finally!
-    startServer();
+    try {
+        await startServer();
+    } catch (e) {
+        vscode.window.showErrorMessage(e.message);
+    }
 
     if (Server.config.displayInlayHints) {
         const hintsUpdater = new HintsUpdater();
@@ -173,25 +178,25 @@ export function activate(context: vscode.ExtensionContext) {
                         editorChangeDisposable.dispose();
                     }
                     return hintsUpdater.refreshHintsForVisibleEditors();
-                }
+                },
             );
 
             disposeOnDeactivation(
                 vscode.window.onDidChangeVisibleTextEditors(_ =>
-                    hintsUpdater.refreshHintsForVisibleEditors()
-                )
+                    hintsUpdater.refreshHintsForVisibleEditors(),
+                ),
             );
             disposeOnDeactivation(
                 vscode.workspace.onDidChangeTextDocument(e =>
-                    hintsUpdater.refreshHintsForVisibleEditors(e)
-                )
+                    hintsUpdater.refreshHintsForVisibleEditors(e),
+                ),
             );
             disposeOnDeactivation(
                 vscode.workspace.onDidChangeConfiguration(_ =>
                     hintsUpdater.toggleHintsDisplay(
-                        Server.config.displayInlayHints
-                    )
-                )
+                        Server.config.displayInlayHints,
+                    ),
+                ),
             );
         });
     }
@@ -204,10 +209,10 @@ export function deactivate(): Thenable<void> {
     return Server.client.stop();
 }
 
-async function reloadServer(startServer: () => void) {
+async function reloadServer(startServer: () => Promise<void>) {
     if (Server.client != null) {
         vscode.window.showInformationMessage('Reloading rust-analyzer...');
         await Server.client.stop();
-        startServer();
+        await startServer();
     }
 }
diff --git a/editors/code/src/highlighting.ts b/editors/code/src/highlighting.ts
index 0a38c9ef6..68eae0941 100644
--- a/editors/code/src/highlighting.ts
+++ b/editors/code/src/highlighting.ts
@@ -67,7 +67,7 @@ export class Highlighter {
     > {