mirror of https://github.com/rust-lang/rust
33 lines
856 B
Rust
33 lines
856 B
Rust
//@revisions: noopt opt
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//@build-pass
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//@[noopt] compile-flags: -Copt-level=0
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//@[opt] compile-flags: -O
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//! This passes without optimizations, so it can (and should) also pass with optimizations.
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struct Fail<T>(T);
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impl<T> Fail<T> {
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const C: () = panic!();
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}
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// This function is not actually called, but is mentioned implicitly as destructor in dead code in a
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// function that is called. Make sure we still find this error.
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impl<T> Drop for Fail<T> {
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fn drop(&mut self) {
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let _ = Fail::<T>::C;
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}
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}
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#[inline(never)]
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fn called<T>(x: T) {
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if false {
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let v = Fail(x);
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std::mem::forget(v);
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// Now the destructor never gets "mentioned" so this build should *not* fail.
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// IOW, this demonstrates that we are using a post-drop-elab notion of "mentioned".
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}
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}
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pub fn main() {
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called::<i32>(0);
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}
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