1 files changed, 66 insertions, 0 deletions
diff --git a/tests/ui/generator/drop-env.rs b/tests/ui/generator/drop-env.rs
new file mode 100644
index 000000000..66dfb8c2c
--- /dev/null
+++ b/tests/ui/generator/drop-env.rs
@@ -0,0 +1,66 @@
+// run-pass
+
+// revisions: default nomiropt
+//[nomiropt]compile-flags: -Z mir-opt-level=0
+
+#![feature(generators, generator_trait)]
+
+use std::ops::Generator;
+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 main() {
+    t1();
+    t2();
+    t3();
+}
+
+fn t1() {
+    let b = B;
+    let mut foo = || {
+        yield;
+        drop(b);
+    };
+
+    let n = A.load(Ordering::SeqCst);
+    drop(Pin::new(&mut foo).resume(()));
+    assert_eq!(A.load(Ordering::SeqCst), n);
+    drop(foo);
+    assert_eq!(A.load(Ordering::SeqCst), n + 1);
+}
+
+fn t2() {
+    let b = B;
+    let mut foo = || {
+        yield b;
+    };
+
+    let n = A.load(Ordering::SeqCst);
+    drop(Pin::new(&mut foo).resume(()));
+    assert_eq!(A.load(Ordering::SeqCst), n + 1);
+    drop(foo);
+    assert_eq!(A.load(Ordering::SeqCst), n + 1);
+}
+
+fn t3() {
+    let b = B;
+    let foo = || {
+        yield;
+        drop(b);
+    };
+
+    let n = A.load(Ordering::SeqCst);
+    assert_eq!(A.load(Ordering::SeqCst), n);
+    drop(foo);
+    assert_eq!(A.load(Ordering::SeqCst), n + 1);
+}