1 files changed, 63 insertions, 0 deletions
diff --git a/src/test/ui/cleanup-rvalue-for-scope.rs b/src/test/ui/cleanup-rvalue-for-scope.rs
new file mode 100644
index 000000000..b6582c01f
--- /dev/null
+++ b/src/test/ui/cleanup-rvalue-for-scope.rs
@@ -0,0 +1,63 @@
+// run-pass
+
+#![allow(non_snake_case)]
+#![allow(dead_code)]
+#![allow(unused_variables)]
+// Test that the lifetime of rvalues in for loops is extended
+// to the for loop itself.
+
+use std::ops::Drop;
+
+static mut FLAGS: u64 = 0;
+
+struct Box<T> { f: T }
+struct AddFlags { bits: u64 }
+
+fn AddFlags(bits: u64) -> AddFlags {
+    AddFlags { bits: bits }
+}
+
+fn arg(exp: u64, _x: &AddFlags) {
+    check_flags(exp);
+}
+
+fn pass<T>(v: T) -> T {
+    v
+}
+
+fn check_flags(exp: u64) {
+    unsafe {
+        let x = FLAGS;
+        FLAGS = 0;
+        println!("flags {}, expected {}", x, exp);
+        assert_eq!(x, exp);
+    }
+}
+
+impl AddFlags {
+    fn check_flags(&self, exp: u64) -> &AddFlags {
+        check_flags(exp);
+        self
+    }
+
+    fn bits(&self) -> u64 {
+        self.bits
+    }
+}
+
+impl Drop for AddFlags {
+    fn drop(&mut self) {
+        unsafe {
+            FLAGS = FLAGS + self.bits;
+        }
+    }
+}
+
+pub fn main() {
+    // The array containing [AddFlags] should not be dropped until
+    // after the for loop:
+    for x in &[AddFlags(1)] {
+        check_flags(0);
+    }
+    check_flags(1);
+}