mirror of
https://github.com/rust-lang/rust
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25 lines
636 B
Rust
25 lines
636 B
Rust
//@revisions: noopt opt
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//@[opt] compile-flags: -O
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//! Make sure we error on erroneous consts even if they are unused.
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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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}
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#[inline(never)]
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const fn no_codegen<T>() {
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if false {
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// This bad constant is only used in dead code in a no-codegen function... and yet we still
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// must make sure that the build fails.
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// This relies on const-eval evaluating all `required_consts` of `const fn`.
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Fail::<T>::C; //~ constant
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}
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}
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pub static FOO: () = no_codegen::<i32>();
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fn main() {
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FOO
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}
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