Add some more test coverage of by-ref unboxed closures

2 files changed, 40 insertions, 0 deletions

diff --git a/src/test/compile-fail/unboxed-closure-region.rs b/src/test/compile-fail/unboxed-closure-region.rs
new file mode 100644
index 00000000000..2a71aeaca5f
--- /dev/null
+++ b/src/test/compile-fail/unboxed-closure-region.rs
@@ -0,0 +1,20 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(unboxed_closures)]
+
+// Test that an unboxed closure that captures a free variable by
+// reference cannot escape the region of that variable.
+fn main() {
+    let _f = {
+        let x = 0u;
+        |:| x //~ ERROR cannot infer an appropriate lifetime due to conflicting requirements
+    };
+}
diff --git a/src/test/compile-fail/unboxed-closures-borrow-conflict.rs b/src/test/compile-fail/unboxed-closures-borrow-conflict.rs
new file mode 100644
index 00000000000..baf7f3f5e58
--- /dev/null
+++ b/src/test/compile-fail/unboxed-closures-borrow-conflict.rs
@@ -0,0 +1,20 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(unboxed_closures)]
+
+// Test that an unboxed closure that mutates a free variable will
+// cause borrow conflicts.
+
+fn main() {
+    let mut x = 0u;
+    let f = |:| x += 1;
+    let _y = x; //~ ERROR cannot use `x` because it was mutably borrowed
+}