1 files changed, 47 insertions, 0 deletions
diff --git a/src/test/ui/traits/issue-68295.rs b/src/test/ui/traits/issue-68295.rs
new file mode 100644
index 000000000..7ff54539a
--- /dev/null
+++ b/src/test/ui/traits/issue-68295.rs
@@ -0,0 +1,47 @@
+// check-fail
+//
+// regression test for #68295
+
+struct Matrix<R, C, S>(R, C, S);
+
+impl<R, C, S> Matrix<R, C, S> {
+    fn into_owned(self) -> Matrix<R, C, Owned<R, C, ()>>
+    where
+        (): Allocator<R, C>,
+    {
+        unimplemented!()
+    }
+}
+
+impl<D, S> Matrix<D, D, S> {
+    fn hermitian_part(&self) -> Matrix<D, D, Owned<D, D, ()>>
+    where
+        (): Allocator<D, D>,
+    {
+        unimplemented!()
+    }
+}
+
+trait Allocator<R, C> {
+    type Buffer;
+}
+
+trait Trait<R, C, A> {
+    type Power;
+}
+
+impl<R, C, A: Allocator<R, C>> Trait<R, C, A> for () {
+    type Power = A::Buffer;
+}
+
+type Owned<R, C, G> = <G as Trait<R, C, ()>>::Power;
+
+fn crash<R, C>(input: Matrix<R, C, ()>) -> Matrix<R, C, u32>
+where
+    (): Allocator<R, C>,
+{
+    input.into_owned()
+    //~^ ERROR mismatched types [E0308]
+}
+
+fn main() {}