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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/issues/issue-41677.rs
parentInitial commit. (diff)
downloadrustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz
rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--src/test/ui/issues/issue-41677.rs28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-41677.rs b/src/test/ui/issues/issue-41677.rs
new file mode 100644
index 000000000..afddbc799
--- /dev/null
+++ b/src/test/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() {
+}