GNU bug report logs - #10159
24.0.91; Segfault with auto-complete package [SEC=UNCLASSIFIED]

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From: Alex Murray <alex.murray <at> dsto.defence.gov.au>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: 10159 <at> debbugs.gnu.org
Subject: bug#10159: 24.0.91; Segfault with auto-complete package [SEC=UNCLASSIFIED]
Date: Tue, 06 Dec 2011 16:17:40 +1030

[Message part 1 (text/plain, inline)]

Okay have managed to reproduce the crash without any optimizations and 
am including the first few stack frames in line - see attached for the 
entire gdb backtrace full output

#0  0x0000000000687832 in composition_compute_stop_pos 
(cmp_it=0x7fffffff9018,
    charpos=74, bytepos=86, endpos=100, string=44875745) at 
composite.c:1073
        elt = 44875745
        ridx = 0
        start = 0
        end = 21769088
        c = 11542528
        prop = 12818946
        val = 390
        MAX_NEWLINE_DISTANCE = 500
#1  0x00000000004371d2 in compute_stop_pos (it=0x7fffffff87b0) at 
xdisp.c:3273
        stoppos = 100
        iv = 0x0
        next_iv = 0x0
        object = 44875745
        limit = 12818946
        position = 0
        charpos = 0
        bytepos = 0
#2  0x0000000000436dd0 in handle_stop (it=0x7fffffff87b0) at xdisp.c:3161
        handled = HANDLED_NORMALLY
        handle_overlay_change_p = 1
        p = 0x8fd8f8
#3  0x00000000004423f9 in next_element_from_string (it=0x7fffffff87b0)
    at xdisp.c:7304
        position = {charpos = 0, bytepos = 0}
#4  0x000000000043f523 in get_next_display_element (it=0x7fffffff87b0)
    at xdisp.c:6375
        success_p = 1


On 02/12/11 16:10, Alex Murray wrote:
> After rebuilding Emacs with -O0 so far I have been unable to reproduce
> this - if I can however I will be sure to send in an updated backtrace.
>
> On Fri 02 Dec 2011 02:39:19 CST, Paul Eggert wrote:
>> Would it be possible to get a backtrace from an Emacs
>> compiled without optimization? That would help to
>> debug things remotely.
>>
>> I realize that you
>> didn't build your Emacs, but perhaps you can ask
>> Damien Cassou, who built it, to also build a version
>> without -O2.

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[gdb.txt (text/plain, attachment)]

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