fix stuck parser

1 files changed, 16 insertions, 0 deletions

diff --git a/crates/libsyntax2/tests/data/parser/ok/0034_macro_2.0.rs b/crates/libsyntax2/tests/data/parser/ok/0034_macro_2.0.rs
new file mode 100644
index 000000000..2a70ee83a
--- /dev/null
+++ b/crates/libsyntax2/tests/data/parser/ok/0034_macro_2.0.rs
@@ -0,0 +1,16 @@
+macro parse_use_trees($($s:expr),* $(,)*) {
+    vec![
+        $(parse_use_tree($s),)*
+    ]
+}
+
+#[test]
+fn test_use_tree_merge() {
+    macro test_merge([$($input:expr),* $(,)*], [$($output:expr),* $(,)*]) {
+        assert_eq!(
+            merge_use_trees(parse_use_trees!($($input,)*)),
+            parse_use_trees!($($output,)*),
+        );
+    }
+}
+