Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/tests/ui/type-alias-impl-trait/issue-76202-trait-impl-for-tait.rs b/tests/ui/type-alias-impl-trait/issue-76202-trait-impl-for-tait.rs
new file mode 100644
index 000000000..b97e444c6
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/issue-76202-trait-impl-for-tait.rs
@@ -0,0 +1,31 @@
+// Regression test for issue #76202
+// Tests that we don't ICE when we have a trait impl on a TAIT.
+
+// check-pass
+
+#![feature(type_alias_impl_trait)]
+
+trait Dummy {}
+impl Dummy for () {}
+
+type F = impl Dummy;
+fn f() -> F {}
+
+trait Test {
+    fn test(self);
+}
+
+impl Test for F {
+    fn test(self) {}
+}
+
+// Ok because `i32` does not implement `Dummy`,
+// so it can't possibly be the hidden type of `F`.
+impl Test for i32 {
+    fn test(self) {}
+}
+
+fn main() {
+    let x: F = f();
+    x.test();
+}