diff --git a/src/test/compile-fail/regions-return-ref-to-upvar-issue-17403.rs b/src/test/compile-fail/regions-return-ref-to-upvar-issue-17403.rs new file mode 100644 index 0000000000000..aedaced5794a7 --- /dev/null +++ b/src/test/compile-fail/regions-return-ref-to-upvar-issue-17403.rs @@ -0,0 +1,30 @@ +// 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 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +// Test that closures cannot subvert aliasing restrictions + +#![feature(overloaded_calls, unboxed_closures)] + +fn main() { + // Unboxed closure case + { + let mut x = 0u; + let mut f = |&mut:| &mut x; //~ ERROR cannot infer + let x = f(); + let y = f(); + } + // Boxed closure case + { + let mut x = 0u; + let f = || &mut x; //~ ERROR cannot infer + let x = f(); + let y = f(); + } +}