Catch specific errors; avoid suppressing CancelledError
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@ -155,7 +155,7 @@ class SessionManager(object):
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host, port = args[:2]
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host, port = args[:2]
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try:
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try:
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self.servers[kind] = await server
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self.servers[kind] = await server
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except Exception as e:
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except OSError as e: # don't suppress CancelledError
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self.logger.error(f'{kind} server failed to listen on {host}:'
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self.logger.error(f'{kind} server failed to listen on {host}:'
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f'{port:d} :{e!r}')
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f'{port:d} :{e!r}')
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else:
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else:
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