Comment 2 for bug 561155

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Anders Kaseorg (andersk) wrote : Re: command_not_found_handle misbehaves when command-not-found is uninstalled

The no-error case is related to the change described in 420161 “command-not-found not working properly in karmic”: bash 4.0 no longer prints its own error message after running command_not_found_handle. (This was worked around in command-not-found by having command-not-found print its own error message.)