Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/ui/type-alias-impl-trait/issue-90400-1.rs b/tests/ui/type-alias-impl-trait/issue-90400-1.rs
new file mode 100644
index 000000000..15aead2f6
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/issue-90400-1.rs
@@ -0,0 +1,29 @@
+// Regression test for #90400,
+// taken from https://github.com/rust-lang/rust/issues/90400#issuecomment-954927836
+
+#![feature(type_alias_impl_trait)]
+
+trait Bar {
+    fn bar(&self);
+}
+
+trait Foo {
+    type FooFn<B>: FnOnce();
+
+    fn foo<B: Bar>(&self, bar: B) -> Self::FooFn<B>;
+}
+
+struct MyFoo;
+
+impl Foo for MyFoo {
+    type FooFn<B> = impl FnOnce();
+
+    fn foo<B: Bar>(&self, bar: B) -> Self::FooFn<B> {
+        move || bar.bar() //~ ERROR: the trait bound `B: Bar` is not satisfied
+    }
+}
+
+fn main() {
+    let boom: <MyFoo as Foo>::FooFn<u32> = unsafe { core::mem::zeroed() };
+    boom();
+}