15 lines
400 B
Rust
15 lines
400 B
Rust
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// Check mutable reference bindings cannot be mutated by an if-let guard.
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#![feature(if_let_guard)]
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fn main() {
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let mut x: Option<Option<i32>> = Some(Some(6));
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match x {
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Some(ref mut y) if let Some(ref mut z) = *y => {
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//~^ ERROR cannot borrow `y.0` as mutable, as it is immutable for the pattern guard
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let _: &mut i32 = z;
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}
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_ => {}
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}
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}
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