mirror of https://github.com/rust-lang/rust
27 lines
769 B
Rust
27 lines
769 B
Rust
//@revisions: noopt opt
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//@ build-fail
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//@[noopt] compile-flags: -Copt-level=0
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//@[opt] compile-flags: -O
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//! Make sure we error on erroneous consts even if they get promoted.
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struct Fail<T>(T);
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impl<T> Fail<T> {
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const C: () = panic!(); //~ERROR evaluation of `Fail::<i32>::C` failed
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//[opt]~^ ERROR evaluation of `Fail::<T>::C` failed
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// (Not sure why optimizations lead to this being emitted twice, but as long as compilation
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// fails either way it's fine.)
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}
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#[inline(never)]
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fn f<T>() {
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if false {
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// If promotion moved `C` from our required_consts to its own, without adding itself to
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// our required_consts, then we'd miss the const-eval failure here.
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let _val = &Fail::<T>::C;
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}
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}
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fn main() {
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f::<i32>();
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}
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