mirror of https://github.com/rust-lang/rust
20 lines
547 B
Rust
20 lines
547 B
Rust
// Regression test for issue #27592.
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fn write<'a, F: ::std::ops::FnOnce()->::std::fmt::Arguments<'a> + 'a>(fcn: F) {
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use std::fmt::Write;
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let _ = match fcn() { a => write!(&mut Stream, "{}", a), };
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}
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struct Stream;
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impl ::std::fmt::Write for Stream {
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fn write_str(&mut self, _s: &str) -> ::std::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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write(|| format_args!("{}", String::from("Hello world")));
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//~^ ERROR cannot return value referencing temporary value
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//~| ERROR cannot return reference to temporary value
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}
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