mirror of https://github.com/rust-lang/rust
55 lines
1.1 KiB
Rust
55 lines
1.1 KiB
Rust
//@ check-pass
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use std::fmt::{self, Display};
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struct Mutex;
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impl Mutex {
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fn lock(&self) -> MutexGuard {
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MutexGuard(self)
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}
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}
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struct MutexGuard<'a>(&'a Mutex);
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impl<'a> Drop for MutexGuard<'a> {
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fn drop(&mut self) {
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// Empty but this is a necessary part of the repro. Otherwise borrow
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// checker is fine with 'a dangling at the time that MutexGuard goes out
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// of scope.
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}
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}
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impl<'a> Display for MutexGuard<'a> {
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fn fmt(&self, _formatter: &mut fmt::Formatter) -> fmt::Result {
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Ok(())
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}
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}
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fn main() {
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let _print: () = {
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let mutex = Mutex;
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print!("{}", mutex.lock()) /* no semicolon */
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};
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let _println: () = {
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let mutex = Mutex;
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println!("{}", mutex.lock()) /* no semicolon */
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};
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let _eprint: () = {
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let mutex = Mutex;
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eprint!("{}", mutex.lock()) /* no semicolon */
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};
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let _eprintln: () = {
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let mutex = Mutex;
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eprintln!("{}", mutex.lock()) /* no semicolon */
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};
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let _panic: () = {
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let mutex = Mutex;
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panic!("{}", mutex.lock()) /* no semicolon */
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};
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}
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