diff --git a/gcc/testsuite/rust/compile/issue-2665.rs b/gcc/testsuite/rust/compile/issue-2665.rs
new file mode 100644
index 000000000000..3ee8e7b22ca0
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-2665.rs
@@ -0,0 +1,6 @@
+fn main() {}
+
+#[cfg(FALSE)]
+impl X {
+    const Y: u8;
+}