diff --git a/src/test/ui/codegen/issue-64401.rs b/src/test/ui/codegen/issue-64401.rs new file mode 100644 index 00000000000..53f85c63b53 --- /dev/null +++ b/src/test/ui/codegen/issue-64401.rs @@ -0,0 +1,51 @@ +// build-pass +// The ICE didn't happen with `cargo check` but `cargo build`. + +use std::marker::PhantomData; + +trait Owned<'a> { + type Reader; +} + +impl<'a> Owned<'a> for () { + type Reader = (); +} + +trait Handler { + fn handle(&self); +} + +struct CtxHandlerWithoutState<M, F> { + message_type: PhantomData<M>, + _function: F, +} + +impl<M, F> CtxHandlerWithoutState<M, F> { + pub fn new(_function: F) -> Self { + Self { + message_type: PhantomData, + _function, + } + } +} + +impl<'a, M, F> Handler for CtxHandlerWithoutState<M, F> +where + F: Fn(<M as Owned<'a>>::Reader), + M: Owned<'a>, +{ + fn handle(&self) {} +} + +fn e_to_i<M: for<'a> Owned<'a>>(_: <M as Owned<'_>>::Reader) {} + +fn send_external_to_internal<M>() +where + M: for<'a> Owned<'a>, +{ + let _: Box<dyn Handler> = Box::new(CtxHandlerWithoutState::<M, _>::new(e_to_i::<M>)); +} + +fn main() { + send_external_to_internal::<()>() +}