1 files changed, 10 insertions, 0 deletions
diff --git a/tests/ui/lint/force-warn/allowed-cli-deny-by-default-lint.rs b/tests/ui/lint/force-warn/allowed-cli-deny-by-default-lint.rs
new file mode 100644
index 000000000..257df13ef
--- /dev/null
+++ b/tests/ui/lint/force-warn/allowed-cli-deny-by-default-lint.rs
@@ -0,0 +1,10 @@
+// --force-warn $LINT causes $LINT (which is deny-by-default) to warn
+// despite $LINT being allowed on command line
+// compile-flags: -A mutable_transmutes --force-warn mutable_transmutes
+// check-pass
+
+fn main() {
+    unsafe {
+        let y = std::mem::transmute::<&i32, &mut i32>(&5); //~WARN: undefined behavior
+    }
+}