1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/type-alias-impl-trait/multiple-def-uses-in-one-fn-pass.rs b/tests/ui/type-alias-impl-trait/multiple-def-uses-in-one-fn-pass.rs
new file mode 100644
index 000000000..21fca047a
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/multiple-def-uses-in-one-fn-pass.rs
@@ -0,0 +1,25 @@
+// check-pass
+#![feature(type_alias_impl_trait)]
+
+type X<A: ToString + Clone, B: ToString + Clone> = impl ToString;
+
+fn f<A: ToString + Clone, B: ToString + Clone>(a: A, b: B) -> (X<A, B>, X<A, B>) {
+    (a.clone(), a)
+}
+
+pub trait Captures<'a> {}
+
+impl<'a, T: ?Sized> Captures<'a> for T {}
+
+type Foo<'a, 'b> = impl std::fmt::Debug + Captures<'a> + Captures<'b>;
+
+fn foo<'x, 'y>(i: &'x i32, j: &'y i32) -> (Foo<'x, 'y>, Foo<'y, 'x>) {
+    (i, j)
+}
+
+fn main() {
+    println!("{}", <X<_, _> as ToString>::to_string(&f(42_i32, String::new()).1));
+    let meh = 42;
+    let muh = 69;
+    println!("{:?}", foo(&meh, &muh));
+}