1 files changed, 15 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-19499.rs b/src/test/ui/issues/issue-19499.rs
new file mode 100644
index 000000000..d09056ce3
--- /dev/null
+++ b/src/test/ui/issues/issue-19499.rs
@@ -0,0 +1,15 @@
+// run-pass
+#![allow(path_statements)]
+#![allow(unused_variables)]
+// Regression test for issue #19499. Due to incorrect caching of trait
+// results for closures with upvars whose types were not fully
+// computed, this rather bizarre little program (along with many more
+// reasonable examples) let to ambiguity errors about not being able
+// to infer sufficient type information.
+
+// pretty-expanded FIXME #23616
+
+fn main() {
+    let n = 0;
+    let it = Some(1_usize).into_iter().inspect(|_| {n;});
+}