1 files changed, 28 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-30530.rs b/src/test/ui/issues/issue-30530.rs
new file mode 100644
index 000000000..111fb8aa5
--- /dev/null
+++ b/src/test/ui/issues/issue-30530.rs
@@ -0,0 +1,28 @@
+// run-pass
+// Regression test for Issue #30530: alloca's created for storing
+// intermediate scratch values during brace-less match arms need to be
+// initialized with their drop-flag set to "dropped" (or else we end
+// up running the destructors on garbage data at the end of the
+// function).
+
+pub enum Handler {
+    Default,
+    #[allow(dead_code)]
+    Custom(*mut Box<dyn Fn()>),
+}
+
+fn main() {
+    #[allow(unused_must_use)] {
+        take(Handler::Default, Box::new(main));
+    }
+}
+
+#[inline(never)]
+pub fn take(h: Handler, f: Box<dyn Fn()>) -> Box<dyn Fn()> {
+    unsafe {
+        match h {
+            Handler::Custom(ptr) => *Box::from_raw(ptr),
+            Handler::Default => f,
+        }
+    }
+}