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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/ui/issues/issue-41677.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.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-41677.rs')
-rw-r--r-- | tests/ui/issues/issue-41677.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/ui/issues/issue-41677.rs b/tests/ui/issues/issue-41677.rs new file mode 100644 index 000000000..afddbc799 --- /dev/null +++ b/tests/ui/issues/issue-41677.rs @@ -0,0 +1,28 @@ +// run-pass +// Regression test for #41677. The local variable was winding up with +// a type `Receiver<?T, H>` where `?T` was unconstrained, because we +// failed to enforce the WF obligations and `?T` is a bivariant type +// parameter position. + +#![allow(unused_variables, dead_code)] + +use std::marker::PhantomData; + +trait Handle { + type Inner; +} + +struct ResizingHandle<H>(PhantomData<H>); +impl<H> Handle for ResizingHandle<H> { + type Inner = H; +} + +struct Receiver<T, H: Handle<Inner=T>>(PhantomData<H>); + +fn channel<T>(size: usize) -> Receiver<T, ResizingHandle<T>> { + let rx = Receiver(PhantomData); + rx +} + +fn main() { +} |