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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/issues/issue-26905.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/issues/issue-26905.rs')
-rw-r--r-- | tests/ui/issues/issue-26905.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/tests/ui/issues/issue-26905.rs b/tests/ui/issues/issue-26905.rs new file mode 100644 index 000000000..4c5c67d58 --- /dev/null +++ b/tests/ui/issues/issue-26905.rs @@ -0,0 +1,23 @@ +#![feature(unsize, coerce_unsized)] + +// Verfies that non-PhantomData ZSTs still cause coercions to fail. +// They might have additional semantics that we don't want to bulldoze. + +use std::marker::{Unsize, PhantomData}; +use std::ops::CoerceUnsized; + +struct NotPhantomData<T: ?Sized>(PhantomData<T>); + +struct MyRc<T: ?Sized> { + _ptr: *const T, + _boo: NotPhantomData<T>, +} + +impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<MyRc<U>> for MyRc<T>{ } //~ERROR + +fn main() { + let data = [1, 2, 3]; + let iter = data.iter(); + let x = MyRc { _ptr: &iter, _boo: NotPhantomData(PhantomData) }; + let _y: MyRc<dyn Iterator<Item=&u32>> = x; +} |