LEXER FAIL

class foo
{
   public static void main(String[] args)
   {
       // This prints: \uXXXX
       System.out.println("\\uXXXX");
   }
}

$ javac -Xlint:all foo.java
foo.java:5: illegal unicode escape
       // This prints: \uXXXX
                         ^
1 error

No, Java. You shouldn't look for escape sequences in comments. Why are you processing string literal escapes there? Why are you even doing it at that stage of processing? C'mon.