1 files changed, 9 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-3878.rs b/tests/ui/issues/issue-3878.rs
new file mode 100644
index 00000000000..6de3405af0d
--- /dev/null
+++ b/tests/ui/issues/issue-3878.rs
@@ -0,0 +1,9 @@
+// run-pass
+// pretty-expanded FIXME #23616
+
+#![allow(path_statements)]
+
+pub fn main() {
+    let y: Box<_> = Box::new(1);
+    y;
+}