1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/impl-trait/bounds_regression.rs b/src/test/ui/impl-trait/bounds_regression.rs
new file mode 100644
index 000000000..31fc46203
--- /dev/null
+++ b/src/test/ui/impl-trait/bounds_regression.rs
@@ -0,0 +1,24 @@
+// run-pass
+
+pub trait FakeGenerator {
+    type Yield;
+    type Return;
+}
+
+pub trait FakeFuture {
+    type Output;
+}
+
+pub fn future_from_generator<
+    T: FakeGenerator<Yield = ()>
+>(x: T) -> impl FakeFuture<Output = T::Return> {
+    GenFuture(x)
+}
+
+struct GenFuture<T: FakeGenerator<Yield = ()>>(#[allow(unused_tuple_struct_fields)] T);
+
+impl<T: FakeGenerator<Yield = ()>> FakeFuture for GenFuture<T> {
+    type Output = T::Return;
+}
+
+fn main() {}