charset_to_utf8 assertion of remaining src_size

[Timo Sirainen]

On 22 May 2015, at 17:44, Xin Li <delphij at delphij.net> wrote:
> 
> On 05/22/15 13:18, Cassidy Larson wrote:
>> We're using FreeBSD 10.1
> 
> I see.  Yes that's the same problem I have seen.
> 
> There is a behavioral difference (I think it's a FreeBSD bug) between
> FreeBSD's iconv(3) and GNU implementation, and there is arguably a bug
> with Dovecot that iconv(3) state should be reset for each multipart
> part.  The two together would trigger the problem when the previous part
> was ended with UTF-7 shift sequence.  Timo have applied a fix (hg:
> 18721:9809f68aaa36) for Dovecot which should mitigates this issue at
> Dovecot side a few days ago.

Could you or somebody help with getting this included as a unit test to Dovecot? I've attached a patch that I guess might cause the crash.

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