1 files changed, 14 insertions, 0 deletions
diff --git a/tests/ui/pattern/usefulness/issue-88747.rs b/tests/ui/pattern/usefulness/issue-88747.rs
new file mode 100644
index 00000000000..948c99f9ce9
--- /dev/null
+++ b/tests/ui/pattern/usefulness/issue-88747.rs
@@ -0,0 +1,14 @@
+// check-pass: this used to be a stack overflow because of recursion in `usefulness.rs`
+
+macro_rules! long_tuple_arg {
+    ([$($t:tt)*]#$($h:tt)*) => {
+        long_tuple_arg!{[$($t)*$($t)*]$($h)*}
+    };
+    ([$([$t:tt $y:tt])*]) => {
+        pub fn _f(($($t,)*): ($($y,)*)) {}
+    }
+}
+
+long_tuple_arg!{[[_ u8]]########## ###}
+
+fn main() {}