1 files changed, 43 insertions, 0 deletions

diff --git a/crates/hir_ty/src/tests/regression.rs b/crates/hir_ty/src/tests/regression.rs
index 94d86b0d1..8cf4e7012 100644
--- a/crates/hir_ty/src/tests/regression.rs
+++ b/crates/hir_ty/src/tests/regression.rs
@@ -840,3 +840,46 @@ fn issue_4966() {
         "#]],
     );
 }
+
+#[test]
+fn issue_6628() {
+    check_infer(
+        r#"
+        #[lang = "fn_once"]
+        pub trait FnOnce<Args> {
+            type Output;
+        }
+
+        struct S<T>();
+        impl<T> S<T> {
+            fn f(&self, _t: T) {}
+            fn g<F: FnOnce(&T)>(&self, _f: F) {}
+        }
+        fn main() {
+            let s = S();
+            s.g(|_x| {});
+            s.f(10);
+        }
+        "#,
+        expect![[r#"
+            105..109 'self': &S<T>
+            111..113 '_t': T
+            118..120 '{}': ()
+            146..150 'self': &S<T>
+            152..154 '_f': F
+            159..161 '{}': ()
+            174..225 '{     ...10); }': ()
+            184..185 's': S<i32>
+            188..189 'S': S<i32>() -> S<i32>
+            188..191 'S()': S<i32>
+            197..198 's': S<i32>
+            197..209 's.g(|_x| {})': ()
+            201..208 '|_x| {}': |&i32| -> ()
+            202..204 '_x': &i32
+            206..208 '{}': ()
+            215..216 's': S<i32>
+            215..222 's.f(10)': ()
+            219..221 '10': i32
+        "#]],
+    );
+}