1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/coherence/coherence-with-closure.rs b/src/test/ui/coherence/coherence-with-closure.rs
new file mode 100644
index 000000000..6e3281d85
--- /dev/null
+++ b/src/test/ui/coherence/coherence-with-closure.rs
@@ -0,0 +1,15 @@
+// Test that encountering closures during coherence does not cause issues.
+#![feature(type_alias_impl_trait)]
+type OpaqueClosure = impl Sized;
+fn defining_use() -> OpaqueClosure {
+    || ()
+}
+
+struct Wrapper<T>(T);
+trait Trait {}
+impl Trait for Wrapper<OpaqueClosure> {}
+//~^ ERROR cannot implement trait on type alias impl trait
+impl<T: Sync> Trait for Wrapper<T> {}
+//~^ ERROR conflicting implementations of trait `Trait` for type `Wrapper<OpaqueClosure>`
+
+fn main() {}