Re: [Gimp-developer] Gimp git on Mac Segfault

Hi again,

I have some working code in my working branch now where I applied the
concepts I wrote about (basically initializing the language store only
once and at the very start of the program, before any threading would
occur hopefully).
Don't know if that will be the finale code, but should be at least
good enough to test on OSX (I don't have access to a OSX machine to
reproduce the bug myself and see if this indeed fixes the issue). As
soon as the report is up, I'll upload the patch there so that someone
with OSX can test it and tell me if that fixes it. :-)


On Thu, Jul 18, 2013 at 9:47 PM, Jehan Pagès <jehan marmottard gmail com> wrote:
Hey all,

it seems I am the culprit for this bug. I don't have this crash on Linux though.

It looks like the implementation of setenv/getenv is different on OSX.
According to glib doc, the problem may be that on some
implementations, successive calls may use the same buffer. I guess
that's the case on OSX. And also these calls are not thread-safe. Also
the fact that there is no LANGUAGE env variable should normally not be
a real problem. I don't have this variable set on my system either
and, as I said, no crash here. I guess this brought the real issue of
the OSX getenv/setenv implementation into light though.

In any case, I think that the real solution is to have the list of all
localized languages generated at startup, before any thread or
anything happens (I just saw that's also what glib doc says: we should
only use these calls on startup before any thread happens). Then we
just use this pre-generated list each time it is needed. I was already
thinking that the current design was bad anyway, because we are
basically parsing a huge file of language codes and names each time we
open the preference dialog! Such a waste of resources and time.
I did not modify it at the time because I did not feel like using more
time towards this, but I guess that should be the occasion to do it.

In any case, please fill a bug report and I'll have a look! :-)


On Thu, Jul 18, 2013 at 6:31 AM, Partha Bagchi <partha1b gmail com> wrote:
Hey V,

Thanks for checking on this. I am glad (in a way) that my system is not the
only one having this issue! :)

I will try to revert the above changes and see if the problem disappears.


On Wed, Jul 17, 2013 at 7:51 AM, su_v <suv-sf users sourceforge net> wrote:

On 2013-07-17 01:19 +0100, Partha Bagchi wrote:
My recent (last built a few moment ago) git builds (2.9) have been
instantly segfaulting on MBR running Mountain Lion.

gdb backtrace (or commandline execution) shows:
./gimp-2.9 (pid:42315): [E]xit, [H]alt, show [S]tack trace or [P]roceed:
#0  0x00007fff8b257698 in __wait4 ()
#1  0x00000001018de353 in g_on_error_stack_trace ()
#2  0x00000001018de7f2 in g_on_error_query ()
#3  0x000000010000fa54 in gimp_eek ()
#4  0x000000010000fac8 in gimp_fatal_error ()
#5  0x0000000100010326 in gimp_sigfatal_handler ()
#6  <signal handler called>
#7  0x00007fff8c40887e in setenv ()
#8  0x00000001018f76cf in g_setenv ()
#9  0x0000000100168c11 in gimp_language_store_self_l10n ()
#10 0x0000000101915c99 in emit_start_element ()
#11 0x00000001019170b0 in g_markup_parse_context_parse ()
#12 0x000000010035a7ba in gimp_xml_parser_parse_io_channel ()
#13 0x000000010035a9ab in gimp_xml_parser_parse_file ()
#14 0x0000000100168f71 in gimp_language_store_parse_iso_codes ()
#15 0x000000010188619b in g_object_new_internal ()
#16 0x0000000101886cdd in g_object_newv ()
#17 0x0000000101886edc in g_object_new ()
#18 0x0000000100168025 in gimp_language_entry_new ()
#19 0x000000010017cc00 in gimp_prop_language_entry_new ()
#20 0x00000001000a3df2 in gimp_text_options_gui ()
#21 0x000000010005e9e6 in gimp_tools_restore ()
#22 0x000000010001428b in gui_restore_callback ()
#23 0x000000010187dd0d in g_closure_invoke ()
#24 0x000000010189483b in signal_emit_unlocked_R ()
#25 0x0000000101897111 in g_signal_emit_valist ()
#26 0x0000000101897964 in g_signal_emit ()
#27 0x000000010000f2fe in app_run ()
#28 0x0000000100011994 in main ()

and gimp-2.9 --verbose
Parsing '/Users/partha/Library/Application
./gimp-2.9: fatal error: Segmentation fault: 11
./gimp-2.9 (pid:42330): [E]xit, [H]alt, show [S]tack trace or [P]roceed:

Is anyone else on the Mac having this issue? Should I file a bug-report?

Reproduced (same stack trace) on MBR (13-inch, Late 2011) running OS X
10.7.5; dependencies for GIMP installed via MacPorts (custom portfiles
for babl, gegl and GIMP git master).

Workaround (at least for this segfault at launch time) is to run GIMP
like this:

$ echo $LANG
$ LANGUAGE="$LANG" gimp --verbose

Possibly related to the changes in


hth, V
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