Bug#697682: libapache2-mod-perl2: Intermittent FTBFS: t/apache/read3.t failure

[Niko Tyni]

Thanks for looking at the patches!

On Wed, Aug 13, 2014 at 09:12:11AM +0100, Steve Hay wrote:

> Thanks for the patch. I haven't seen this failure myself on Windows,
> but the patch certainly doesn't seem to break anything. I'm a little
> uneasy about it, though. It seems odd to structure read3.pm
> differently to read2.pm and read4.pm, which still have a plan emitted
> before the first read().
> 
> Why does read3.pm deadlock but read2.pm and read4.pm don't? If it's
> just luck then perhaps read2.pm and read4.pm should be changed
> similarly?

It only happens with read3 because the POSTed string in that test is
very much larger than the other ones. LWP::Protocol::http sends the
whole POST request in one write() unless it's over eight kilobytes long
(see lib/LWP/Protocol/http.pm in libwww-perl_6.08 line 276.)

>From a correctness POV, I suppose the others should indeed do the same
in the (IMO unlikely) case LWP::Protocol::http ever changes to do two
writes even for such short requests.

> Maybe a comment in the code would be good too, since the structure of
> most test files is to get the plan out early. Otherwise there is scope
> for re-introducing the bug in the future since it isn't obvious that
> the placement of the plan is important.

Yeah, I agree that would be good. 

I can send a revised patch later later.
-- 
Niko Tyni   ntyni at debian.org