26 lines
803 B
Rust
26 lines
803 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 detect erroneous constants post-monomorphization even when they are unused. This is
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//! crucial, people rely on it for soundness. (https://github.com/rust-lang/rust/issues/112090)
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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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fn called<T>() {
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// Any function that is called is guaranteed to have all consts that syntactically
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// appear in its body evaluated, even if they only appear in dead code.
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// This relies on mono-item collection checking `required_consts` in collected functions.
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if false {
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let _ = Fail::<T>::C;
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}
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}
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pub fn main() {
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called::<i32>();
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}
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