1 files changed, 15 insertions, 0 deletions
diff --git a/tests/ui/impl-trait/impl-fn-parsing-ambiguities.rs b/tests/ui/impl-trait/impl-fn-parsing-ambiguities.rs
new file mode 100644
index 00000000000..61303a5b2cb
--- /dev/null
+++ b/tests/ui/impl-trait/impl-fn-parsing-ambiguities.rs
@@ -0,0 +1,15 @@
+#![feature(impl_trait_in_fn_trait_return)]
+use std::fmt::Debug;
+
+fn a() -> impl Fn(&u8) -> impl Debug + '_ {
+    //~^ ERROR ambiguous `+` in a type
+    //~| ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
+    |x| x
+}
+
+fn b() -> impl Fn() -> impl Debug + Send {
+    //~^ ERROR ambiguous `+` in a type
+    || ()
+}
+
+fn main() {}