1 files changed, 9 insertions, 0 deletions
diff --git a/tests/rustdoc-ui/nested-macro-rules-47639.rs b/tests/rustdoc-ui/nested-macro-rules-47639.rs
new file mode 100644
index 000000000..210b1e79c
--- /dev/null
+++ b/tests/rustdoc-ui/nested-macro-rules-47639.rs
@@ -0,0 +1,9 @@
+// check-pass
+// This should not ICE
+
+// https://github.com/rust-lang/rust/issues/47639
+pub fn test() {
+    macro_rules! foo {
+        () => ()
+    }
+}