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We resolve guard patterns' guards in `resolve_pattern_inner`, so to avoid resolving them multiple times, we must avoid doing so earlier. To accomplish this, `LateResolutionVisitor::visit_pat` contains a case for guard patterns that avoids visiting their guards while walking patterns. This fixes an ICE due to `visit::walk_pat` being used instead, which meant guards at the top level of a pattern would be visited twice.
13 lines
438 B
Rust
13 lines
438 B
Rust
//! Regression test for <https://github.com/rust-lang/rust/issues/141265>.
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//! Make sure expressions in top-level guard patterns are only resolved once.
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fn main() {
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for
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else if b 0 {}
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//~^ ERROR expected identifier, found keyword `else`
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//~| ERROR missing `in` in `for` loop
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//~| ERROR cannot find value `b` in this scope
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//~| ERROR guard patterns are experimental
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//~| ERROR `{integer}` is not an iterator
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}
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