1 files changed, 38 insertions, 0 deletions
diff --git a/src/test/ui/generator/panic-drops-resume.rs b/src/test/ui/generator/panic-drops-resume.rs
new file mode 100644
index 000000000..8d8eb6a97
--- /dev/null
+++ b/src/test/ui/generator/panic-drops-resume.rs
@@ -0,0 +1,38 @@
+//! Tests that panics inside a generator will correctly drop the initial resume argument.
+
+// run-pass
+// needs-unwind
+// ignore-wasm       no unwind support
+// ignore-emscripten no unwind support
+
+#![feature(generators, generator_trait)]
+
+use std::ops::Generator;
+use std::panic::{catch_unwind, AssertUnwindSafe};
+use std::pin::Pin;
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+static DROP: AtomicUsize = AtomicUsize::new(0);
+
+struct Dropper {}
+
+impl Drop for Dropper {
+    fn drop(&mut self) {
+        DROP.fetch_add(1, Ordering::SeqCst);
+    }
+}
+
+fn main() {
+    let mut gen = |_arg| {
+        if true {
+            panic!();
+        }
+        yield ();
+    };
+    let mut gen = Pin::new(&mut gen);
+
+    assert_eq!(DROP.load(Ordering::Acquire), 0);
+    let res = catch_unwind(AssertUnwindSafe(|| gen.as_mut().resume(Dropper {})));
+    assert!(res.is_err());
+    assert_eq!(DROP.load(Ordering::Acquire), 1);
+}