25 lines
778 B
Rust
25 lines
778 B
Rust
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Test that a by-ref `FnMut` closure gets an error when it tries to
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// mutate a value.
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fn call<F>(f: F) where F : Fn() {
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f();
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}
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fn main() {
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let mut counter = 0_u32;
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call(|| {
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counter += 1;
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//~^ ERROR cannot assign to data in a captured outer variable in an `Fn` closure
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});
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}
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