1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/mir/mir-inlining/no-trait-method-issue-40473.rs b/tests/ui/mir/mir-inlining/no-trait-method-issue-40473.rs
new file mode 100644
index 00000000000..8b3cb703dc0
--- /dev/null
+++ b/tests/ui/mir/mir-inlining/no-trait-method-issue-40473.rs
@@ -0,0 +1,16 @@
+// run-pass
+// compile-flags:-Zmir-opt-level=3
+pub trait Foo {
+    fn bar(&self) -> usize { 2 }
+}
+
+impl Foo for () {
+    fn bar(&self) -> usize { 3 }
+}
+
+// Test a case where MIR would inline the default trait method
+// instead of bailing out. Issue #40473.
+fn main() {
+    let result = ().bar();
+    assert_eq!(result, 3);
+}