16 files changed, 83 insertions, 321 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 1c893cd5c..db8b49122 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -323,7 +323,7 @@ dependencies = [
  "const_fn",
  "crossbeam-utils 0.8.1",
  "lazy_static",
- "memoffset",
+ "memoffset 0.6.1",
  "scopeguard",
 ]
 
@@ -910,6 +910,15 @@ dependencies = [
 
 [[package]]
 name = "memoffset"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "043175f069eda7b85febe4a74abbaeff828d9f8b448515d3151a14a3542811aa"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "memoffset"
 version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "157b4208e3059a8f9e78d559edc658e13df41410cb3ae03979c83130067fdd87"
@@ -1316,14 +1325,14 @@ checksum = "3b181ba2dcf07aaccad5448e8ead58db5b742cf85dfe035e2227f137a539a189"
 
 [[package]]
 name = "rowan"
-version = "0.10.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e081ed6eacce09e243b619ab90f069c27b0cff8a6d0eb8ad2ec935b65853798"
+checksum = "ca9516377b32367ade2fbe1846c75afa4827c8976f1c7d05d5473573d18a1a04"
 dependencies = [
  "rustc-hash",
  "smol_str",
  "text-size",
- "thin-dst",
+ "triomphe",
 ]
 
 [[package]]
@@ -1569,6 +1578,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
+[[package]]
 name = "stdx"
 version = "0.0.0"
 dependencies = [
@@ -1655,12 +1670,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "thin-dst"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db3c46be180f1af9673ebb27bc1235396f61ef6965b3fe0dbb2e624deb604f0e"
-
-[[package]]
 name = "thread_local"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1802,6 +1811,17 @@ dependencies = [
 ]
 
 [[package]]
+name = "triomphe"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e9d872053cf9e5a833d8c1dd772cdc38ab66a908129d6f73c049c986161d07c"
+dependencies = [
+ "memoffset 0.5.6",
+ "serde",
+ "stable_deref_trait",
+]
+
+[[package]]
 name = "tt"
 version = "0.0.0"
 dependencies = [
diff --git a/crates/assists/src/assist_context.rs b/crates/assists/src/assist_context.rs
index 321fe77f3..8d93edba2 100644
--- a/crates/assists/src/assist_context.rs
+++ b/crates/assists/src/assist_context.rs
@@ -2,7 +2,6 @@
 
 use std::mem;
 
-use algo::find_covering_element;
 use hir::Semantics;
 use ide_db::{
     base_db::{AnchoredPathBuf, FileId, FileRange},
@@ -94,11 +93,11 @@ impl<'a> AssistContext<'a> {
         self.sema.find_node_at_offset_with_descend(self.source_file.syntax(), self.offset())
     }
     pub(crate) fn covering_element(&self) -> SyntaxElement {
-        find_covering_element(self.source_file.syntax(), self.frange.range)
+        self.source_file.syntax().covering_element(self.frange.range)
     }
     // FIXME: remove
     pub(crate) fn covering_node_for_range(&self, range: TextRange) -> SyntaxElement {
-        find_covering_element(self.source_file.syntax(), range)
+        self.source_file.syntax().covering_element(range)
     }
 }
 
diff --git a/crates/completion/src/context.rs b/crates/completion/src/context.rs
index d809460e2..b1e8eba85 100644
--- a/crates/completion/src/context.rs
+++ b/crates/completion/src/context.rs
@@ -4,10 +4,8 @@ use hir::{Local, ScopeDef, Semantics, SemanticsScope, Type};
 use ide_db::base_db::{FilePosition, SourceDatabase};
 use ide_db::{call_info::ActiveParameter, RootDatabase};
 use syntax::{
-    algo::{find_covering_element, find_node_at_offset},
-    ast, match_ast, AstNode, NodeOrToken,
-    SyntaxKind::*,
-    SyntaxNode, SyntaxToken, TextRange, TextSize,
+    algo::find_node_at_offset, ast, match_ast, AstNode, NodeOrToken, SyntaxKind::*, SyntaxNode,
+    SyntaxToken, TextRange, TextSize,
 };
 use test_utils::mark;
 use text_edit::Indel;
@@ -513,7 +511,7 @@ impl<'a> CompletionContext<'a> {
 }
 
 fn find_node_with_range<N: AstNode>(syntax: &SyntaxNode, range: TextRange) -> Option<N> {
-    find_covering_element(syntax, range).ancestors().find_map(N::cast)
+    syntax.covering_element(range).ancestors().find_map(N::cast)
 }
 
 fn is_node<N: AstNode>(node: &SyntaxNode) -> bool {
diff --git a/crates/hir_expand/src/db.rs b/crates/hir_expand/src/db.rs
index c62086390..467516eb7 100644
--- a/crates/hir_expand/src/db.rs
+++ b/crates/hir_expand/src/db.rs
@@ -118,7 +118,7 @@ pub fn expand_hypothetical(
         parse_macro_with_arg(db, macro_file, Some(std::sync::Arc::new((tt, tmap_1)))).value?;
     let token_id = macro_def.0.map_id_down(token_id);
     let range = tmap_2.range_by_token(token_id)?.by_kind(token_to_map.kind())?;
-    let token = syntax::algo::find_covering_element(&node.syntax_node(), range).into_token()?;
+    let token = node.syntax_node().covering_element(range).into_token()?;
     Some((node.syntax_node(), token))
 }
 
diff --git a/crates/hir_expand/src/lib.rs b/crates/hir_expand/src/lib.rs
index 3fa1b1d77..e388ddacc 100644
--- a/crates/hir_expand/src/lib.rs
+++ b/crates/hir_expand/src/lib.rs
@@ -22,7 +22,7 @@ use std::sync::Arc;
 
 use base_db::{impl_intern_key, salsa, CrateId, FileId, FileRange};
 use syntax::{
-    algo::{self, skip_trivia_token},
+    algo::skip_trivia_token,
     ast::{self, AstNode},
     Direction, SyntaxNode, SyntaxToken, TextRange, TextSize,
 };
@@ -335,7 +335,7 @@ impl ExpansionInfo {
 
         let range = self.exp_map.range_by_token(token_id)?.by_kind(token.value.kind())?;
 
-        let token = algo::find_covering_element(&self.expanded.value, range).into_token()?;
+        let token = self.expanded.value.covering_element(range).into_token()?;
 
         Some(self.expanded.with_value(token))
     }
@@ -360,8 +360,8 @@ impl ExpansionInfo {
         };
 
         let range = token_map.range_by_token(token_id)?.by_kind(token.value.kind())?;
-        let token = algo::find_covering_element(&tt.value, range + tt.value.text_range().start())
-            .into_token()?;
+        let token =
+            tt.value.covering_element(range + tt.value.text_range().start()).into_token()?;
         Some((tt.with_value(token), origin))
     }
 }
diff --git a/crates/ide/src/extend_selection.rs b/crates/ide/src/extend_selection.rs
index 56418c960..17a540972 100644
--- a/crates/ide/src/extend_selection.rs
+++ b/crates/ide/src/extend_selection.rs
@@ -3,7 +3,7 @@ use std::iter::successors;
 use hir::Semantics;
 use ide_db::RootDatabase;
 use syntax::{
-    algo::{self, find_covering_element, skip_trivia_token},
+    algo::{self, skip_trivia_token},
     ast::{self, AstNode, AstToken},
     Direction, NodeOrToken,
     SyntaxKind::{self, *},
@@ -76,7 +76,7 @@ fn try_extend_selection(
         };
         return Some(leaf_range);
     };
-    let node = match find_covering_element(root, range) {
+    let node = match root.covering_element(range) {
         NodeOrToken::Token(token) => {
             if token.text_range() != range {
                 return Some(token.text_range());
@@ -120,7 +120,7 @@ fn extend_tokens_from_range(
     macro_call: ast::MacroCall,
     original_range: TextRange,
 ) -> Option<TextRange> {
-    let src = find_covering_element(&macro_call.syntax(), original_range);
+    let src = macro_call.syntax().covering_element(original_range);
     let (first_token, last_token) = match src {
         NodeOrToken::Node(it) => (it.first_token()?, it.last_token()?),
         NodeOrToken::Token(it) => (it.clone(), it),
diff --git a/crates/ide/src/join_lines.rs b/crates/ide/src/join_lines.rs
index 05380f2a1..981467c8d 100644
--- a/crates/ide/src/join_lines.rs
+++ b/crates/ide/src/join_lines.rs
@@ -1,7 +1,7 @@
 use assists::utils::extract_trivial_expression;
 use itertools::Itertools;
 use syntax::{
-    algo::{find_covering_element, non_trivia_sibling},
+    algo::non_trivia_sibling,
     ast::{self, AstNode, AstToken},
     Direction, NodeOrToken, SourceFile,
     SyntaxKind::{self, USE_TREE, WHITESPACE},
@@ -31,7 +31,7 @@ pub(crate) fn join_lines(file: &SourceFile, range: TextRange) -> TextEdit {
         range
     };
 
-    let node = match find_covering_element(file.syntax(), range) {
+    let node = match file.syntax().covering_element(range) {
         NodeOrToken::Node(node) => node,
         NodeOrToken::Token(token) => token.parent(),
     };
diff --git a/crates/ide/src/syntax_tree.rs b/crates/ide/src/syntax_tree.rs
index 1f26f8043..1d4bac7ad 100644
--- a/crates/ide/src/syntax_tree.rs
+++ b/crates/ide/src/syntax_tree.rs
@@ -1,7 +1,7 @@
 use ide_db::base_db::{FileId, SourceDatabase};
 use ide_db::RootDatabase;
 use syntax::{
-    algo, AstNode, NodeOrToken, SourceFile, SyntaxKind::STRING, SyntaxToken, TextRange, TextSize,
+    AstNode, NodeOrToken, SourceFile, SyntaxKind::STRING, SyntaxToken, TextRange, TextSize,
 };
 
 // Feature: Show Syntax Tree
@@ -21,7 +21,7 @@ pub(crate) fn syntax_tree(
 ) -> String {
     let parse = db.parse(file_id);
     if let Some(text_range) = text_range {
-        let node = match algo::find_covering_element(parse.tree().syntax(), text_range) {
+        let node = match parse.tree().syntax().covering_element(text_range) {
             NodeOrToken::Node(node) => node,
             NodeOrToken::Token(token) => {
                 if let Some(tree) = syntax_tree_for_string(&token, text_range) {
diff --git a/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable.txt b/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable.txt
index 23d42b4d0..5c282fe67 100644
--- a/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable.txt
+++ b/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable.txt
@@ -66,52 +66,7 @@
             ),
             data: None,
         },
-        fixes: [
-            CodeAction {
-                title: "consider prefixing with an underscore",
-                group: None,
-                kind: Some(
-                    CodeActionKind(
-                        "quickfix",
-                    ),
-                ),
-                edit: Some(
-                    SnippetWorkspaceEdit {
-                        changes: Some(
-                            {
-                                Url {
-                                    scheme: "file",
-                                    host: None,
-                                    port: None,
-                                    path: "/test/driver/subcommand/repl.rs",
-                                    query: None,
-                                    fragment: None,
-                                }: [
-                                    TextEdit {
-                                        range: Range {
-                                            start: Position {
-                                                line: 290,
-                                                character: 8,
-                                            },
-                                            end: Position {
-                                                line: 290,
-                                                character: 11,
-                                            },
-                                        },
-                                        new_text: "_foo",
-                                    },
-                                ],
-                            },
-                        ),
-                        document_changes: None,
-                    },
-                ),
-                is_preferred: Some(
-                    true,
-                ),
-                data: None,
-            },
-        ],
+        fixes: [],
     },
     MappedRustDiagnostic {
         url: Url {
diff --git a/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable_as_hint.txt b/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable_as_hint.txt
index 4e428bedc..d36d7693d 100644
--- a/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable_as_hint.txt
+++ b/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable_as_hint.txt
@@ -66,52 +66,7 @@
             ),
             data: None,
         },
-        fixes: [
-            CodeAction {
-                title: "consider prefixing with an underscore",
-                group: None,
-                kind: Some(
-                    CodeActionKind(
-                        "quickfix",
-                    ),
-                ),
-                edit: Some(
-                    SnippetWorkspaceEdit {
-                        changes: Some(
-                            {
-                                Url {
-                                    scheme: "file",
-                                    host: None,
-                                    port: None,
-                                    path: "/test/driver/subcommand/repl.rs",
-                                    query: None,
-                                    fragment: None,
-                                }: [
-                                    TextEdit {
-                                        range: Range {
-                                            start: Position {
-                                                line: 290,
-                                                character: 8,
-                                            },
-                                            end: Position {
-                                                line: 290,
-                                                character: 11,
-                                            },
-                                        },
-                                        new_text: "_foo",
-                                    },
-                                ],
-                            },
-                        ),
-                        document_changes: None,
-                    },
-                ),
-                is_preferred: Some(
-                    true,
-                ),
-                data: None,
-            },
-        ],
+        fixes: [],
     },
     MappedRustDiagnostic {
         url: Url {
diff --git a/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable_as_info.txt b/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable_as_info.txt
index 4ddd7efae..17845b711 100644
--- a/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable_as_info.txt
+++ b/crates/rust-analyzer/src/diagnostics/test_data/rustc_unused_variable_as_info.txt
@@ -66,52 +66,7 @@
             ),
             data: None,
         },
-        fixes: [
-            CodeAction {
-                title: "consider prefixing with an underscore",
-                group: None,
-                kind: Some(
-                    CodeActionKind(
-                        "quickfix",
-                    ),
-                ),
-                edit: Some(
-                    SnippetWorkspaceEdit {
-                        changes: Some(
-                            {
-                                Url {
-                                    scheme: "file",
-                                    host: None,
-                                    port: None,
-                                    path: "/test/driver/subcommand/repl.rs",
-                                    query: None,
-                                    fragment: None,
-                                }: [
-                                    TextEdit {
-                                        range: Range {
-                                            start: Position {
-                                                line: 290,
-                                                character: 8,
-                                            },
-                                            end: Position {
-                                                line: 290,
-                                                character: 11,
-                                            },
-                                        },
-                                        new_text: "_foo",
-                                    },
-                                ],
-                            },
-                        ),
-                        document_changes: None,
-                    },
-                ),
-                is_preferred: Some(
-                    true,
-                ),
-                data: None,
-            },
-        ],
+        fixes: [],
     },
     MappedRustDiagnostic {
         url: Url {
diff --git a/crates/rust-analyzer/src/diagnostics/test_data/snap_multi_line_fix.txt b/crates/rust-analyzer/src/diagnostics/test_data/snap_multi_line_fix.txt
index 4cbdb3b92..a19962167 100644
--- a/crates/rust-analyzer/src/diagnostics/test_data/snap_multi_line_fix.txt
+++ b/crates/rust-analyzer/src/diagnostics/test_data/snap_multi_line_fix.txt
@@ -102,65 +102,7 @@
             tags: None,
             data: None,
         },
-        fixes: [
-            CodeAction {
-                title: "return the expression directly",
-                group: None,
-                kind: Some(
-                    CodeActionKind(
-                        "quickfix",
-                    ),
-                ),
-                edit: Some(
-                    SnippetWorkspaceEdit {
-                        changes: Some(
-                            {
-                                Url {
-                                    scheme: "file",
-                                    host: None,
-                                    port: None,
-                                    path: "/test/src/main.rs",
-                                    query: None,
-                                    fragment: None,
-                                }: [
-                                    TextEdit {
-                                        range: Range {
-                                            start: Position {
-                                                line: 2,
-                                                character: 4,
-                                            },
-                                            end: Position {
-                                                line: 2,
-                                                character: 30,
-                                            },
-                                        },
-                                        new_text: "",
-                                    },
-                                    TextEdit {
-                                        range: Range {
-                                            start: Position {
-                                                line: 3,
-                                                character: 4,
-                                            },
-                                            end: Position {
-                                                line: 3,
-                                                character: 5,
-                                            },
-                                        },
-                                        new_text: "(0..10).collect()",
-                                    },
-                                ],
-                            },
-                        ),
-                        document_changes: None,
-                    },
-                ),
-                is_preferred: Some(
-                    true,
-                ),
-                data: None,
-            },
-        ],
+        fixes: [],
     },
     MappedRustDiagnostic {
         url: Url {
@@ -242,65 +184,7 @@
             tags: None,
             data: None,
         },
-        fixes: [
-            CodeAction {
-                title: "return the expression directly",
-                group: None,
-                kind: Some(
-                    CodeActionKind(
-                        "quickfix",
-                    ),
-                ),
-                edit: Some(
-                    SnippetWorkspaceEdit {
-                        changes: Some(
-                            {
-                                Url {
-                                    scheme: "file",
-                                    host: None,
-                                    port: None,
-                                    path: "/test/src/main.rs",
-                                    query: None,
-                                    fragment: None,
-                                }: [
-                                    TextEdit {
-                                        range: Range {
-                                            start: Position {
-                                                line: 2,
-                                                character: 4,
-                                            },
-                                            end: Position {
-                                                line: 2,
-                                                character: 30,
-                                            },
-                                        },
-                                        new_text: "",
-                                    },
-                                    TextEdit {
-                                        range: Range {
-                                            start: Position {
-                                                line: 3,
-                                                character: 4,
-                                            },
-                                            end: Position {
-                                                line: 3,
-                                                character: 5,
-                                            },
-                                        },
-                                        new_text: "(0..10).collect()",
-                                    },
-                                ],
-                            },
-                        ),
-                        document_changes: None,
-                    },
-                ),
-                is_preferred: Some(
-                    true,
-                ),
-                data: None,
-            },
-        ],
+        fixes: [],
     },
     MappedRustDiagnostic {
         url: Url {
diff --git a/crates/rust-analyzer/src/diagnostics/to_proto.rs b/crates/rust-analyzer/src/diagnostics/to_proto.rs
index 540759198..757899484 100644
--- a/crates/rust-analyzer/src/diagnostics/to_proto.rs
+++ b/crates/rust-analyzer/src/diagnostics/to_proto.rs
@@ -74,11 +74,13 @@ fn diagnostic_related_information(
     Some(lsp_types::DiagnosticRelatedInformation { location, message })
 }
 
+struct SubDiagnostic {
+    related: lsp_types::DiagnosticRelatedInformation,
+    suggested_fix: Option<lsp_ext::CodeAction>,
+}
+
 enum MappedRustChildDiagnostic {
-    Related {
-        related: lsp_types::DiagnosticRelatedInformation,
-        suggested_fix: Option<lsp_ext::CodeAction>,
-    },
+    SubDiagnostic(SubDiagnostic),
     MessageLine(String),
 }
 
@@ -105,15 +107,15 @@ fn map_rust_child_diagnostic(
     }
 
     if edit_map.is_empty() {
-        MappedRustChildDiagnostic::Related {
+        MappedRustChildDiagnostic::SubDiagnostic(SubDiagnostic {
             related: lsp_types::DiagnosticRelatedInformation {
                 location: location(workspace_root, spans[0]),
                 message: rd.message.clone(),
             },
             suggested_fix: None,
-        }
+        })
     } else {
-        MappedRustChildDiagnostic::Related {
+        MappedRustChildDiagnostic::SubDiagnostic(SubDiagnostic {
             related: lsp_types::DiagnosticRelatedInformation {
                 location: location(workspace_root, spans[0]),
                 message: rd.message.clone(),
@@ -130,7 +132,7 @@ fn map_rust_child_diagnostic(
                 is_preferred: Some(true),
                 data: None,
             }),
-        }
+        })
     }
 }
 
@@ -175,26 +177,22 @@ pub(crate) fn map_rust_diagnostic_to_lsp(
     }
 
     let mut needs_primary_span_label = true;
-    let mut related_information = Vec::new();
+    let mut subdiagnostics = Vec::new();
     let mut tags = Vec::new();
 
     for secondary_span in rd.spans.iter().filter(|s| !s.is_primary) {
         let related = diagnostic_related_information(workspace_root, secondary_span);
         if let Some(related) = related {
-            related_information.push(related);
+            subdiagnostics.push(SubDiagnostic { related, suggested_fix: None });
         }
     }
 
-    let mut fixes = Vec::new();
     let mut message = rd.message.clone();
     for child in &rd.children {
         let child = map_rust_child_diagnostic(workspace_root, &child);
         match child {
-            MappedRustChildDiagnostic::Related { related, suggested_fix } => {
-                related_information.push(related);
-                if let Some(code_action) = suggested_fix {
-                    fixes.push(code_action);
-                }
+            MappedRustChildDiagnostic::SubDiagnostic(sub) => {
+                subdiagnostics.push(sub);
             }
             MappedRustChildDiagnostic::MessageLine(message_line) => {
                 format_to!(message, "\n{}", message_line);
@@ -284,7 +282,7 @@ pub(crate) fn map_rust_diagnostic_to_lsp(
                 diagnostics.push(MappedRustDiagnostic {
                     url: in_macro_location.uri,
                     diagnostic,
-                    fixes: fixes.clone(),
+                    fixes: Vec::new(),
                 });
             }
 
@@ -298,17 +296,20 @@ pub(crate) fn map_rust_diagnostic_to_lsp(
                     code_description: code_description.clone(),
                     source: Some(source.clone()),
                     message,
-                    related_information: if related_information.is_empty() {
+                    related_information: if subdiagnostics.is_empty() {
                         None
                     } else {
-                        let mut related = related_information.clone();
+                        let mut related = subdiagnostics
+                            .iter()
+                            .map(|sub| sub.related.clone())
+                            .collect::<Vec<_>>();
                         related.extend(related_macro_info);
                         Some(related)
                     },
                     tags: if tags.is_empty() { None } else { Some(tags.clone()) },
                     data: None,
                 },
-                fixes: fixes.clone(),
+                fixes: Vec::new(),
             });
 
             // Emit hint-level diagnostics for all `related_information` entries such as "help"s.
@@ -318,21 +319,21 @@ pub(crate) fn map_rust_diagnostic_to_lsp(
                 location,
                 message: "original diagnostic".to_string(),
             };
-            for info in &related_information {
+            for sub in &subdiagnostics {
                 // Filter out empty/non-existent messages, as they greatly confuse VS Code.
-                if info.message.is_empty() {
+                if sub.related.message.is_empty() {
                     continue;
                 }
                 diagnostics.push(MappedRustDiagnostic {
-                    url: info.location.uri.clone(),
-                    fixes: fixes.clone(), // share fixes to make them easier to apply
+                    url: sub.related.location.uri.clone(),
+                    fixes: sub.suggested_fix.iter().cloned().collect(),
                     diagnostic: lsp_types::Diagnostic {
-                        range: info.location.range,
+                        range: sub.related.location.range,
                         severity: Some(lsp_types::DiagnosticSeverity::Hint),
                         code: code.clone().map(lsp_types::NumberOrString::String),
                         code_description: code_description.clone(),
                         source: Some(source.clone()),
-                        message: info.message.clone(),
+                        message: sub.related.message.clone(),
                         related_information: Some(vec![back_ref.clone()]),
                         tags: None, // don't apply modifiers again
                         data: None,
diff --git a/crates/syntax/Cargo.toml b/crates/syntax/Cargo.toml
index cfeaed9e6..ad8b797fe 100644
--- a/crates/syntax/Cargo.toml
+++ b/crates/syntax/Cargo.toml
@@ -12,7 +12,7 @@ doctest = false
 
 [dependencies]
 itertools = "0.10.0"
-rowan = "0.10.0"
+rowan = "0.10.1"
 rustc_lexer = { version = "697.0.0", package = "rustc-ap-rustc_lexer" }
 rustc-hash = "1.1.0"
 arrayvec = "0.5.1"
diff --git a/crates/syntax/src/algo.rs b/crates/syntax/src/algo.rs
index 39da45cc0..827ae78f9 100644
--- a/crates/syntax/src/algo.rs
+++ b/crates/syntax/src/algo.rs
@@ -45,7 +45,7 @@ pub fn find_node_at_offset<N: AstNode>(syntax: &SyntaxNode, offset: TextSize) ->
 }
 
 pub fn find_node_at_range<N: AstNode>(syntax: &SyntaxNode, range: TextRange) -> Option<N> {
-    find_covering_element(syntax, range).ancestors().find_map(N::cast)
+    syntax.covering_element(range).ancestors().find_map(N::cast)
 }
 
 /// Skip to next non `trivia` token
@@ -74,10 +74,6 @@ pub fn non_trivia_sibling(element: SyntaxElement, direction: Direction) -> Optio
     }
 }
 
-pub fn find_covering_element(root: &SyntaxNode, range: TextRange) -> SyntaxElement {
-    root.covering_element(range)
-}
-
 pub fn least_common_ancestor(u: &SyntaxNode, v: &SyntaxNode) -> Option<SyntaxNode> {
     if u == v {
         return Some(u.clone());
diff --git a/crates/syntax/src/parsing/reparsing.rs b/crates/syntax/src/parsing/reparsing.rs
index 78eaf3410..76f01084c 100644
--- a/crates/syntax/src/parsing/reparsing.rs
+++ b/crates/syntax/src/parsing/reparsing.rs
@@ -10,7 +10,6 @@ use parser::Reparser;
 use text_edit::Indel;
 
 use crate::{
-    algo,
     parsing::{
         lexer::{lex_single_syntax_kind, tokenize, Token},
         text_token_source::TextTokenSource,
@@ -41,7 +40,7 @@ fn reparse_token<'node>(
     root: &'node SyntaxNode,
     edit: &Indel,
 ) -> Option<(GreenNode, Vec<SyntaxError>, TextRange)> {
-    let prev_token = algo::find_covering_element(root, edit.delete).as_token()?.clone();
+    let prev_token = root.covering_element(edit.delete).as_token()?.clone();
     let prev_token_kind = prev_token.kind();
     match prev_token_kind {
         WHITESPACE | COMMENT | IDENT | STRING => {
@@ -124,7 +123,7 @@ fn is_contextual_kw(text: &str) -> bool {
 }
 
 fn find_reparsable_node(node: &SyntaxNode, range: TextRange) -> Option<(SyntaxNode, Reparser)> {
-    let node = algo::find_covering_element(node, range);
+    let node = node.covering_element(range);
 
     let mut ancestors = match node {
         NodeOrToken::Token(it) => it.parent().ancestors(),