mq: avoid silent failure when single patch doesn't apply (issue4604)...
mq: avoid silent failure when single patch doesn't apply (issue4604)
The error-handling here is quite byzantine. self._apply raises an
AbortNoCleanup, but self.apply was swallowing the exception and
returns 2. In self.push, we catch all exceptions.. and cleanup. We try
to print a message to clean up.. but that relies on having a
top-of-stack.
Instead, we re-raise the abort in self.apply, and avoid cleanup on
AbortNoCleanup in self.push by adding a trivial new except clause. We
also modernize the now-visible abort message.
