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To: XEmacs Developers <xemacs-beta@xemacs.org>
Subject: Re: `skip_debugger'
References: <kigu3iqpqr4.fsf@jagor.srce.hr> <by3eqa8rtk.fsf@midget.math.ethz.ch>
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From: Hrvoje Niksic <hniksic@srce.hr>
Date: 22 Jun 1997 21:05:19 +0200
In-Reply-To: Jan Vroonhof's message of "22 Jun 1997 19:34:31 +0200"
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Jan Vroonhof <vroonhof@math.ethz.ch> writes:

> Hrvoje Niksic <hniksic@srce.hr> writes:
> 
> > Lisp_Int when reaching Ferror_message_string. Now, I'd like to ask you
> > all: HOW DID THE DATA ARGUMENT GET CORRUPTED?
> 
> I don't have any recent beta's, but is it possible that there was a
> garbage colletion? (altough I cannot see where this would have
> happened)

Neither can I -- that's the whole point.  About the only things
possibly "called" are XCAR, XCDR, CONSP and EQ.  None of these should
have caused garbage collection.  None of these could have caused even
a "normal" C data corruption.

The case is baffling to me, and the worst part is that I am absolutely 
unable to repeat it.

In fact, I cannot even compile XEmacs with union type and debugging
flags.  Something is seriously wrong. :-(

> This seems to be the only route one could get to signal_call_debugger
> in 19.15.

Fsignal is called by other functions whenever something goes wrong.

> P.S. Is is possible to find out at crash time whether a variable is
> GCPRO`ed?

I don't know -- good question.

-- 
Hrvoje Niksic <hniksic@srce.hr> | Student at FER Zagreb, Croatia
--------------------------------+--------------------------------
Contrary to popular belief, Unix is user friendly.  
It just happens to be selective about who it makes friends with.

