1 files changed, 20 insertions, 0 deletions
diff --git a/tests/ui/closures/infer-signature-from-impl.rs b/tests/ui/closures/infer-signature-from-impl.rs
new file mode 100644
index 000000000..6e8c94177
--- /dev/null
+++ b/tests/ui/closures/infer-signature-from-impl.rs
@@ -0,0 +1,20 @@
+// revisions: current next
+//[next] compile-flags: -Ztrait-solver=next
+//[next] known-bug: trait-system-refactor-initiative#71
+//[current] check-pass
+
+trait Foo {}
+fn needs_foo<T>(_: T)
+where
+    Wrap<T>: Foo,
+{
+}
+
+struct Wrap<T>(T);
+impl<T> Foo for Wrap<T> where T: Fn(i32) {}
+
+fn main() {
+    needs_foo(|x| {
+        x.to_string();
+    });
+}