23 lines
748 B
Rust
23 lines
748 B
Rust
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// Copyright 2017 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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// MutexGuard<Cell<i32>> must not be Sync, that would be unsound.
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use std::sync::Mutex;
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use std::cell::Cell;
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fn test_sync<T: Sync>(_t: T) {}
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fn main()
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{
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let m = Mutex::new(Cell::new(0i32));
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let guard = m.lock().unwrap();
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test_sync(guard); //~ ERROR the trait bound
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}
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