1 files changed, 17 insertions, 0 deletions
diff --git a/tests/ui/save-analysis/issue-68621.rs b/tests/ui/save-analysis/issue-68621.rs
new file mode 100644
index 00000000000..30479580f11
--- /dev/null
+++ b/tests/ui/save-analysis/issue-68621.rs
@@ -0,0 +1,17 @@
+// compile-flags: -Zsave-analysis
+
+#![feature(type_alias_impl_trait)]
+
+trait Trait {}
+
+trait Service {
+    type Future: Trait;
+}
+
+struct Struct;
+
+impl Service for Struct {
+    type Future = impl Trait; //~ ERROR: unconstrained opaque type
+}
+
+fn main() {}