1 files changed, 20 insertions, 0 deletions
diff --git a/tests/ui/traits/next-solver/opaques/different-bound-vars.rs b/tests/ui/traits/next-solver/opaques/different-bound-vars.rs
new file mode 100644
index 00000000000..5801a5edeb4
--- /dev/null
+++ b/tests/ui/traits/next-solver/opaques/different-bound-vars.rs
@@ -0,0 +1,20 @@
+// Check whether we support defining uses with different bound vars.
+// This needs to handle both mismatches for the same opaque type storage
+// entry, but also between different entries.
+
+//@ revisions: current next
+//@ ignore-compare-mode-next-solver (explicit revisions)
+//@[next] compile-flags: -Znext-solver
+//@[next] check-pass
+
+fn foo<T, U>(b: bool) -> impl Sized {
+    if b {
+        let _: for<'a> fn(&'a ()) = foo::<T, U>(false);
+        let _: for<'b> fn(&'b ()) = foo::<U, T>(false);
+        //[current]~^ ERROR concrete type differs from previous defining opaque type use
+    }
+
+    (|&()| ()) as for<'c> fn(&'c ())
+}
+
+fn main() {}