Merging upstream version 1.76.0+dfsg1.

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

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/ui/traits/next-solver/dont-normalize-proj-with-error.rs b/tests/ui/traits/next-solver/dont-normalize-proj-with-error.rs
new file mode 100644
index 000000000..fd1682cd6
--- /dev/null
+++ b/tests/ui/traits/next-solver/dont-normalize-proj-with-error.rs
@@ -0,0 +1,22 @@
+// compile-flags: -Znext-solver
+
+// Test that we don't incorrectly leak unconstrained inference variables
+// if the projection contained an error. This caused an ICE in writeback.
+
+trait Mirror {
+    type Assoc: ?Sized;
+}
+
+struct Wrapper<T: ?Sized>(T);
+impl<T: ?Sized> Mirror for Wrapper<T> {
+    type Assoc = T;
+}
+
+fn mirror<W: Mirror>(_: W) -> Box<W::Assoc> { todo!() }
+
+fn type_error() -> TypeError { todo!() }
+//~^ ERROR cannot find type `TypeError` in this scope
+
+fn main() {
+    let x = mirror(type_error());
+}