https://bugzilla.redhat.com/show_bug.cgi?id=2119963
--- Comment #4 from Petr Pisar <ppi...@redhat.com> ---
(gdb) bt
#0 0x00007ffff7451203 in XCopyGC () at /lib64/libX11.so.6
#1 0x00007ffff736c6e2 in apc_gp_push (self=93825005492864,
destructor=<optimized out>, user_data=0x0, user_data_size=<optimized out>) at
unix/graphics.c:2311
#2 0x00007ffff736c8e6 in prima_prepare_drawable_for_painting
(self=93825005492864, inside_on_paint=0) at unix/graphics.c:165
#3 0x00007ffff737f800 in apc_menu_item_begin_paint (self=<optimized out>,
event=<optimized out>) at unix/menu.c:2439
#4 0x00007ffff72a4155 in AbstractMenu_handle_event (self=93825005133536,
event=0x7fffffffd830) at class/AbstractMenu.c:1468
#5 0x00007ffff72b1d23 in Component_message (self=93825005133536,
event=0x7fffffffd830) at class/Component.c:307
#6 0x00007ffff73799dd in menuitem_draw_custom
(m=<optimized out>, draw=0x7fffffffd7f0, param=0x0, rgn=0x55555618e050,
ix=0x5555561f1490, x=0, y=100, str_size=<synthetic pointer>, str_ptr=<synthetic
pointer>, vertical=1, descent=4, clr=0, rgb=0, index=<optimized out>,
selected=0, w=<optimized out>, win=50331706, self=93825005133536) at
unix/menu.c:1230
#7 handle_menu_expose (ev=<optimized out>, win=50331706, self=93825005133536)
at unix/menu.c:1355
#8 0x00007ffff735a0a6 in prima_handle_event (ev=0x7fffffffdca0,
next_event=0x0) at unix/event.c:1169
#9 0x00007ffff735baeb in send_queued_x_events
(careOfApplication=careOfApplication@entry=1) at unix/event.c:2063
#10 0x00007ffff735ca5e in handle_queued_events
(careOfApplication=careOfApplication@entry=1) at unix/event.c:2225
#11 0x00007ffff735ce94 in prima_one_loop_round (wait=1, careOfApplication=1) at
unix/event.c:2246
#12 0x00007ffff734d5ef in apc_application_go (self=<optimized out>) at
unix/app.c:1052
#13 apc_application_go (self=<optimized out>) at unix/app.c:1045
#14 0x00007ffff728e151 in template_xs_Bool_Handle (cv=<optimized out>,
subName=0x7ffff73a3e5e "Prima::Application::go", func=0x7ffff734d590
<apc_application_go>) at include/generic/thunks.tinc:3559
#15 0x00007ffff7d1eed0 in Perl_pp_entersub () at /lib64/libperl.so.5.36
#16 0x00007ffff7d10850 in Perl_runops_standard () at /lib64/libperl.so.5.36
#17 0x00007ffff7c80fa1 in perl_run () at /lib64/libperl.so.5.36
#18 0x000055555555534a in main ()
(gdb) frame 1
#1 0x00007ffff736c6e2 in apc_gp_push (self=93825005492864,
destructor=<optimized out>, user_data=0x0, user_data_size=<optimized out>) at
unix/graphics.c:2311
2311 XCopyGC( DISP, state->paint.gc, (1 << (GCLastBit + 1))
- 1, XX->gc);
(gdb) p state->paint
$1 = {fore = {primary = 0, secondary = 0, color = 0, balance = 0 '\000'}, back
= {primary = 0, secondary = 0, color = 0, balance = 0 '\000'}, gc = 0x0, gcl =
0x0, gc_pool = 0x7ffff73ff0b8 <guts+728>,
region = 0x0, tile = 0, stipple = 0, kill_tile = 0, kill_stipple = 0}
This looks like a NULL pointer (state->paint.gc) dereference in XCopyGC(). But
the apc_gp_push() part is fishy:
state->paint.gc = XX-> gc;
state->paint.gcl = XX-> gcl;
XX->gcl = NULL;
XX->gc = NULL;
state->paint.gc_pool = prima_get_gc(XX);
XCopyGC( DISP, state->paint.gc, (1 << (GCLastBit + 1)) - 1, XX->gc);
What's the point of XCopyGC( DISP, NULL, ALL_GC_COMPONENTS, NULL)?
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https://bugzilla.redhat.com/show_bug.cgi?id=2119963
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