mirror of https://github.com/rust-lang/rust
20 lines
589 B
Rust
20 lines
589 B
Rust
// Checks that an unreachable code warning is emitted when an expression is
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// preceded by an expression with an uninhabited type. Previously, the
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// variable liveness analysis was "smarter" than the reachability analysis
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// in this regard, which led to confusing "unused variable" warnings
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// without an accompanying explanatory "unreachable expression" warning.
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//@ check-pass
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#![warn(unused_variables,unreachable_code)]
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enum Foo {}
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fn f() -> Foo {todo!()}
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fn main() {
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let x = f();
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//~^ WARNING: unused variable: `x`
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let _ = x;
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//~^ WARNING: unreachable expression
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}
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