3 files changed, 95 insertions, 1 deletions

diff --git a/crates/ra_hir_ty/src/tests/regression.rs b/crates/ra_hir_ty/src/tests/regression.rs
index 09d684ac2..8b3aa8564 100644
--- a/crates/ra_hir_ty/src/tests/regression.rs
+++ b/crates/ra_hir_ty/src/tests/regression.rs
@@ -1,7 +1,8 @@
-use super::infer;
 use insta::assert_snapshot;
 use test_utils::covers;
 
+use super::infer;
+
 #[test]
 fn bug_484() {
     assert_snapshot!(
@@ -331,3 +332,36 @@ pub fn main_loop() {
     "###
     );
 }
+
+#[test]
+fn issue_2669() {
+    assert_snapshot!(
+        infer(
+            r#"trait A {}
+    trait Write {}
+    struct Response<T> {}
+
+    trait D {
+        fn foo();
+    }
+
+    impl<T:A> D for Response<T> {
+        fn foo() {
+            end();
+            fn end<W: Write>() {
+                let _x: T =  loop {};
+            }
+        }
+    }"#
+        ),
+        @r###"
+    [147; 262) '{     ...     }': ()
+    [161; 164) 'end': fn end<{unknown}>() -> ()
+    [161; 166) 'end()': ()
+    [199; 252) '{     ...     }': ()
+    [221; 223) '_x': !
+    [230; 237) 'loop {}': !
+    [235; 237) '{}': ()
+    "###
+    )
+}
diff --git a/crates/ra_hir_ty/src/tests/simple.rs b/crates/ra_hir_ty/src/tests/simple.rs
index 3e5e163e3..00134c99b 100644
--- a/crates/ra_hir_ty/src/tests/simple.rs
+++ b/crates/ra_hir_ty/src/tests/simple.rs
@@ -1518,6 +1518,7 @@ fn test() {
     [167; 179) 'GLOBAL_CONST': u32
     [189; 191) 'id': u32
     [194; 210) 'Foo::A..._CONST': u32
+    [126; 128) '99': u32
     "###
     );
 }
@@ -1549,6 +1550,8 @@ fn test() {
     [233; 246) 'GLOBAL_STATIC': u32
     [256; 257) 'w': u32
     [260; 277) 'GLOBAL...IC_MUT': u32
+    [118; 120) '99': u32
+    [161; 163) '99': u32
     "###
     );
 }
diff --git a/crates/ra_hir_ty/src/tests/traits.rs b/crates/ra_hir_ty/src/tests/traits.rs
index ae316922b..0bc72644a 100644
--- a/crates/ra_hir_ty/src/tests/traits.rs
+++ b/crates/ra_hir_ty/src/tests/traits.rs
@@ -38,6 +38,63 @@ mod future {
 }
 
 #[test]
+fn infer_async() {
+    let (db, pos) = TestDB::with_position(
+        r#"
+//- /main.rs crate:main deps:std
+
+async fn foo() -> u64 {
+    128
+}
+
+fn test() {
+    let r = foo();
+    let v = r.await;
+    v<|>;
+}
+
+//- /std.rs crate:std
+#[prelude_import] use future::*;
+mod future {
+    trait Future {
+        type Output;
+    }
+}
+
+"#,
+    );
+    assert_eq!("u64", type_at_pos(&db, pos));
+}
+
+#[test]
+fn infer_desugar_async() {
+    let (db, pos) = TestDB::with_position(
+        r#"
+//- /main.rs crate:main deps:std
+
+async fn foo() -> u64 {
+    128
+}
+
+fn test() {
+    let r = foo();
+    r<|>;
+}
+
+//- /std.rs crate:std
+#[prelude_import] use future::*;
+mod future {
+    trait Future {
+        type Output;
+    }
+}
+
+"#,
+    );
+    assert_eq!("impl Future<Output = u64>", type_at_pos(&db, pos));
+}
+
+#[test]
 fn infer_try() {
     let (db, pos) = TestDB::with_position(
         r#"