GNU bug report logs - #14569
24.3.50; bootstrap fails on Cygwin

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From: Angelo Graziosi <angelo.graziosi <at> alice.it>
To: Ken Brown <kbrown <at> cornell.edu>
Cc: 14569 <at> debbugs.gnu.org, eggert <at> cs.ucla.edu
Subject: bug#14569: 24.3.50; bootstrap fails on Cygwin
Date: Fri, 28 Jun 2013 18:22:22 +0200

Il 28/06/2013 17.29, Ken Brown ha scritto:
> On 6/28/2013 10:50 AM, Paul Eggert wrote:
>> On 06/28/2013 05:20 AM, Ken Brown wrote:
>>
>>>   #ifndef CANNOT_DUMP
>>> +#ifdef CYGWIN
>>> +  if (! noninteractive)
>>> +#else
>>>     if (! noninteractive || initialized)
>>>   #endif
>>> +#endif
>>
>> I'm dubious about this proposal.
>>
>> If there's an obscure race-condition bug during bootstrapping
>> that makes Emacs crash, why isn't it plausible that a similar
>> bug could occur during normal operation?  Bootstrapping is
>> a more-intense activity that could well be more likely to
>> trigger races, but isn't it more plausible that the races
>> could occur at any time?
>
> I don't know, because I don't know when the race during bootstrapping
> was happening.  If it was happening when emacs was doing the tickling
> (in init_process_emacs), then my suggested change could conceivably
> cause emacs to crash immediately after startup.  Assuming this doesn't
> happen often, I think it's better than having bugs in subprocess handling.
>
> On the other hand, if the race happens when emacs *executes* the glib
> handler (stored in lib_child_handler), then I agree with you that my
> proposal is unacceptable.
>
> I would suggest that we try my proposal but leave the bug open while we
> see how it works.  If people start seeing random crashes, then we'll
> know it was a bad idea and we can revert it.

Just for completeness...

I have bootstrapped r. 113214 with Ken's patch. Emacs has been build 
fine, no errors. I have installed it and after 3 hours it is still 
running...

I would adopt Ken's idea and ping people to use/bootstrap trunk... Let's 
see if we can catch Mobydick...


Ciao,
 Angelo.

(PS. Why Thunderbird refuses 14569 <at> debbugs.gnu.org address in my replay? 
I have always to change manually it in bug-gnu-emacs <at> gnu.org...)

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