Fix another crash

2 files changed, 31 insertions, 0 deletions

diff --git a/crates/ra_hir/src/ty/snapshots/tests__infer_nested_generics_crash.snap b/crates/ra_hir/src/ty/snapshots/tests__infer_nested_generics_crash.snap
new file mode 100644
index 000000000..209454a91
--- /dev/null
+++ b/crates/ra_hir/src/ty/snapshots/tests__infer_nested_generics_crash.snap
@@ -0,0 +1,12 @@
+---
+created: "2019-02-11T21:59:04.302375838Z"
+creator: [email protected]
+source: crates/ra_hir/src/ty/tests.rs
+expression: "&result"
+---
+[92; 106) 'query_response': Canonical<QueryResponse<R>>
+[137; 167) '{     ...lue; }': ()
+[143; 164) '&query....value': &QueryResponse<R>
+[144; 158) 'query_response': Canonical<QueryResponse<R>>
+[144; 164) 'query_....value': QueryResponse<R>
+
diff --git a/crates/ra_hir/src/ty/tests.rs b/crates/ra_hir/src/ty/tests.rs
index e64fd2749..203f1fe4d 100644
--- a/crates/ra_hir/src/ty/tests.rs
+++ b/crates/ra_hir/src/ty/tests.rs
@@ -719,6 +719,25 @@ fn extra_compiler_flags() {
     );
 }
 
+#[test]
+fn infer_nested_generics_crash() {
+    // another crash found typechecking rustc
+    check_inference(
+        "infer_nested_generics_crash",
+        r#"
+struct Canonical<V> {
+    value: V,
+}
+struct QueryResponse<V> {
+    value: V,
+}
+fn test<R>(query_response: Canonical<QueryResponse<R>>) {
+    &query_response.value;
+}
+"#,
+    );
+}
+
 fn infer(content: &str) -> String {
     let (db, _, file_id) = MockDatabase::with_single_file(content);
     let source_file = db.parse(file_id);