[PATCH] parser: fix parsing of messages with empty subjects

[Daniel Axtens]

Stephen Finucane <stephen at that.guru> writes:

> On Sat, 2017-07-08 at 00:24 +1000, Daniel Axtens wrote:
>> The fuzz fixups made the test too strict ("if not subject" rather than
>> "if subject is None") in an attempt to catch broken subject headers.
>> This broke parsing of messages with an empty subject.
>> 
>> Fix it and add a test.
>> 
>> Signed-off-by: Daniel Axtens <dja at axtens.net>
>
> Is a mail with an empty subject really valid for our use cases?

You can get a valid patch with an empty subject. It's dumb and people
shouldn't do it, but it is not broken per se.

Regards,
Daniel

>
> Stephen