gdb.info: Bug Criteria

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Have you found a bug?

If you are not sure whether you have found a bug, here are some
guidelines:
   * If the debugger gets a fatal signal, for any input whatever, that
     is a GDB bug.  Reliable debuggers never crash.
   * If GDB produces an error message for valid input, that is a bug.
     (Note that if you're cross debugging, the problem may also be
     somewhere in the connection to the target.)
   * If GDB does not produce an error message for invalid input, that
     is a bug.  However, you should note that your idea of "invalid
     input" might be our idea of "an extension" or "support for
     traditional practice".
   * If you are an experienced user of debugging tools, your suggestions
     for improvement of GDB are welcome in any case.