Running the following code snippet on current JDK causes an infinite loop:

class Scratch {
  public static int matcher(Object l, Object r) {
    record Pair(Object left, Object right) { }
    return switch (new Pair(l, r)) {
      case Pair(Byte b, var $$) -> 1;
      case Pair(var $, Byte str) -> 1;
      default -> -1;
    };
  }

  public static void main(String[] args) {
    System.out.println(matcher(null, "1"));
  }
}

This was originally reported here: https://github.com/SAP/SapMachine/issues/1571