1 files changed, 12 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-37725.rs b/src/test/ui/issues/issue-37725.rs
new file mode 100644
index 000000000..1c6df0da6
--- /dev/null
+++ b/src/test/ui/issues/issue-37725.rs
@@ -0,0 +1,12 @@
+// build-pass
+// compiler-opts: -Zmir-opt-level=2
+
+#![allow(dead_code)]
+trait Foo {
+    fn foo(&self);
+}
+
+fn foo<'a>(s: &'a mut ()) where &'a mut (): Foo {
+    s.foo();
+}
+fn main() {}