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Changes between Initial Version and Version 1 of Ticket #16674, comment 4

initial	v1
10	10	return ['Custom error message']
11	11	}}}
12
	12	[http://lockerdome.com/blog]
13	13	The spec only says that the container may re-raise the exception if the headers have already been sent, which is clearly not the case if the app only calls start_response() once, as Django's WSGIHandler does. This seems pretty clear from both the wording in the PEP and the wsgiref reference implementation.