1 files changed, 61 insertions, 0 deletions
diff --git a/tests/ui/coroutine/conditional-drop.rs b/tests/ui/coroutine/conditional-drop.rs
new file mode 100644
index 000000000..634095c7a
--- /dev/null
+++ b/tests/ui/coroutine/conditional-drop.rs
@@ -0,0 +1,61 @@
+// run-pass
+
+// revisions: default nomiropt
+//[nomiropt]compile-flags: -Z mir-opt-level=0
+
+#![feature(coroutines, coroutine_trait)]
+
+use std::ops::Coroutine;
+use std::pin::Pin;
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+static A: AtomicUsize = AtomicUsize::new(0);
+
+struct B;
+
+impl Drop for B {
+    fn drop(&mut self) {
+        A.fetch_add(1, Ordering::SeqCst);
+    }
+}
+
+
+fn test() -> bool { true }
+fn test2() -> bool { false }
+
+fn main() {
+    t1();
+    t2();
+}
+
+fn t1() {
+    let mut a = || {
+        let b = B;
+        if test() {
+            drop(b);
+        }
+        yield;
+    };
+
+    let n = A.load(Ordering::SeqCst);
+    Pin::new(&mut a).resume(());
+    assert_eq!(A.load(Ordering::SeqCst), n + 1);
+    Pin::new(&mut a).resume(());
+    assert_eq!(A.load(Ordering::SeqCst), n + 1);
+}
+
+fn t2() {
+    let mut a = || {
+        let b = B;
+        if test2() {
+            drop(b);
+        }
+        yield;
+    };
+
+    let n = A.load(Ordering::SeqCst);
+    Pin::new(&mut a).resume(());
+    assert_eq!(A.load(Ordering::SeqCst), n);
+    Pin::new(&mut a).resume(());
+    assert_eq!(A.load(Ordering::SeqCst), n + 1);
+}