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proc = self.start_bzr_subprocess(self._test_process_args,
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env_changes=dict(BZR_SIGQUIT_PDB=None))
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# wait for it to get started, and print the 'listening' line
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# break into the debugger
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os.kill(proc.pid, signal.SIGQUIT)
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# now send a second sigquit, which should cause it to exit. That