1 files changed, 15 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-18353.rs b/tests/ui/issues/issue-18353.rs
new file mode 100644
index 000000000..3d15c9980
--- /dev/null
+++ b/tests/ui/issues/issue-18353.rs
@@ -0,0 +1,15 @@
+// run-pass
+#![allow(dead_code)]
+// Test that wrapping an unsized struct in an enum which gets optimised does
+// not ICE.
+
+// pretty-expanded FIXME #23616
+
+struct Str {
+    f: [u8]
+}
+
+fn main() {
+    let str: Option<&Str> = None;
+    let _ = str.is_some();
+}