mirror of https://github.com/rust-lang/rust
38 lines
915 B
Rust
38 lines
915 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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//! This fails without optimizations, so it should also fail 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!(); //~ERROR evaluation of `Fail::<i32>::C` failed
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}
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trait MyTrait {
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fn not_called(&self);
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}
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// This function is not actually called, but it is mentioned in a vtable in a function that is
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// called. Make sure we still find this error.
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// This ensures that we are properly considering vtables when gathering "mentioned" items.
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impl<T> MyTrait for Vec<T> {
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fn not_called(&self) {
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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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}
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#[inline(never)]
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fn called<T>() {
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if false {
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let v: Vec<T> = Vec::new();
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let gen_vtable: &dyn MyTrait = &v; // vtable is "mentioned" here
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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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