mirror of https://github.com/rust-lang/rust
22 lines
631 B
Rust
22 lines
631 B
Rust
// We used to ICE if you had a single match arm with multiple
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// candidate patterns with `ref mut` identifiers used in the arm's
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// guard.
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//
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// Also, this test expands on the original bug's example by actually
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// trying to double check that we are matching against the right part
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// of the input data based on which candidate pattern actually fired.
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//@ run-pass
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fn foo(x: &mut Result<(u32, u32), (u32, u32)>) -> u32 {
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match *x {
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Ok((ref mut v, _)) | Err((_, ref mut v)) if *v > 0 => { *v }
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_ => { 0 }
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}
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}
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fn main() {
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assert_eq!(foo(&mut Ok((3, 4))), 3);
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assert_eq!(foo(&mut Err((3, 4))), 4);
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}
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