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-rw-r--r--crates/ra_hir_ty/src/tests/regression.rs31
1 files changed, 31 insertions, 0 deletions
diff --git a/crates/ra_hir_ty/src/tests/regression.rs b/crates/ra_hir_ty/src/tests/regression.rs
index 14c8ed3a9..a02e3ee05 100644
--- a/crates/ra_hir_ty/src/tests/regression.rs
+++ b/crates/ra_hir_ty/src/tests/regression.rs
@@ -453,3 +453,34 @@ pub mod str {
453 // should be Option<char>, but currently not because of Chalk ambiguity problem 453 // should be Option<char>, but currently not because of Chalk ambiguity problem
454 assert_eq!("(Option<{unknown}>, Option<{unknown}>)", super::type_at_pos(&db, pos)); 454 assert_eq!("(Option<{unknown}>, Option<{unknown}>)", super::type_at_pos(&db, pos));
455} 455}
456
457#[test]
458fn issue_3642_bad_macro_stackover() {
459 let (db, pos) = TestDB::with_position(
460 r#"
461//- /main.rs
462#[macro_export]
463macro_rules! match_ast {
464 (match $node:ident { $($tt:tt)* }) => { match_ast!(match ($node) { $($tt)* }) };
465
466 (match ($node:expr) {
467 $( ast::$ast:ident($it:ident) => $res:expr, )*
468 _ => $catch_all:expr $(,)?
469 }) => {{
470 $( if let Some($it) = ast::$ast::cast($node.clone()) { $res } else )*
471 { $catch_all }
472 }};
473}
474
475fn main() {
476 let anchor<|> = match_ast! {
477 match parent {
478 as => {},
479 _ => return None
480 }
481 };
482}"#,
483 );
484
485 assert_eq!("()", super::type_at_pos(&db, pos));
486}