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bug#27761: Crash while using proof-general/company-coq on OS X


From: Денис Редозубов
Subject: bug#27761: Crash while using proof-general/company-coq on OS X
Date: Wed, 19 Jul 2017 15:03:37 -0400

I think it's reasonable to do both, but maybe it makes more sense to me to start with the latter. I'll need some help from John though. We'll keep you posted.

2017-07-19 14:40 GMT-04:00 Eli Zaretskii <address@hidden>:
> From: John Wiegley <address@hidden>
> Cc: address@hiddenaddress@hidden
> Date: Wed, 19 Jul 2017 14:34:15 -0400
>
> >>>>> Eli Zaretskii <address@hidden> writes:
>
> >> This may be hard, but we'll try. It's 100% reproducible in both 25.1 and
> >> 25.2, but involves company-coq, Proof General, and some particular source
> >> files.
>
> > Aren't those available for reproducing on another machine?
>
> Sure, if you're willing to install them, we can send the source files and the
> exact steps.

Please go ahead.

> > Alternatively, I could guide you through debugging the recursion, but I'll
> > need you to use GDB, not the macOS debugger.
>
> Sadly, only lldb is possible here. :(

Then I cannot help you with specific commands, but if you could step
through that code in get_next_display_element which recurses, and tell
me why it does so, what is the character where this happens, and what
is the value of it->method there, it could give some hints.


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