GNU gdb (GDB) 10.1-alt1 (ALT Sisyphus)
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-alt-linux".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/lib64/GNUstep/Applications/Pixen.app/Pixen...
Reading symbols from /usr/lib/debug/usr/lib64/GNUstep/Applications/Pixen.app/Pixen.debug...
[New LWP 6413]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `Pixen'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f4a06e309f8 in objc_msg_lookup (receiver=0xa91, op=0x5653273b56e0 <_OBJC_SELECTOR_TABLE+1856>)
    at /usr/src/debug/gcc-10.3.1-20210703/libobjc/sendmsg.c:442
442	      result = sarray_get_safe (receiver->class_pointer->dtable,

Thread 1 (Thread 0x7f4a0306de40 (LWP 6413)):
#0  0x00007f4a06e309f8 in objc_msg_lookup (receiver=0xa91, op=0x5653273b56e0 <_OBJC_SELECTOR_TABLE+1856>) at /usr/src/debug/gcc-10.3.1-20210703/libobjc/sendmsg.c:442
#1  0x0000565327332977 in -[PXImage colorAtX:y:] (self=<optimized out>, _cmd=<optimized out>, x=32, y=1) at PXImage.m:81
#2  0x00005653273340e2 in -[PXImage drawRect:withOpacity:fixBug:] (self=0x56535b9a9ce0, _cmd=<optimized out>, rect=..., anOpacity=1, fixBug=<optimized out>) at PXImage.m:275
#3  0x00005653273395ed in -[PXLayer drawRect:fixBug:] (self=0x56535b99d170, _cmd=<optimized out>, rect=..., fixBug=<optimized out>) at PXLayer.m:142
#4  0x0000565327319f09 in -[PXCanvas drawRect:fixBug:] (self=self@entry=0x56535c58ec80, _cmd=_cmd@entry=0x565327399f80 <_OBJC_SELECTOR_TABLE+2560>, rect=..., fixBug=fixBug@entry=0 '\000') at PXCanvas.m:713
#5  0x00005653273274d8 in -[PXCanvasView _drawRect:] (self=0x56535c4d98d0, _cmd=<optimized out>, rect=...) at PXCanvasView.m:256
#6  0x0000565327329d38 in -[PXCanvasView drawRect:] (self=0x56535c4d98d0, _cmd=<optimized out>, rect=...) at PXCanvasView.m:287
#7  0x00007f4a06a01b53 in -[NSView displayRectIgnoringOpacity:inContext:] (self=0x56535c4d98d0, _cmd=<optimized out>, aRect=..., context=0x56535b1cfef0) at NSView.m:2599
#8  0x00007f4a06a02308 in -[NSView displayRectIgnoringOpacity:inContext:] (self=<optimized out>, _cmd=<optimized out>, aRect=..., context=<optimized out>) at NSView.m:2633
#9  0x00007f4a06a01737 in -[NSView displayIfNeededInRectIgnoringOpacity:] (self=0x56535b7fa6a0, _cmd=<optimized out>, aRect=...) at NSView.m:2479
#10 0x00007f4a06a01989 in -[NSView displayIfNeededInRectIgnoringOpacity:] (self=0x56535ad244d0, _cmd=<optimized out>, aRect=...) at NSView.m:2505
#11 0x00007f4a06a01989 in -[NSView displayIfNeededInRectIgnoringOpacity:] (self=0x56535af68510, _cmd=<optimized out>, aRect=...) at NSView.m:2505
#12 0x00007f4a06a01989 in -[NSView displayIfNeededInRectIgnoringOpacity:] (self=0x56535ba08cb0, _cmd=<optimized out>, aRect=...) at NSView.m:2505
#13 0x00007f4a069f45c9 in -[NSView displayIfNeeded] (self=0x56535ba08cb0, _cmd=<optimized out>) at NSView.m:2439
#14 0x00007f4a06a0c53c in -[NSWindow orderWindow:relativeTo:] (self=0x56535ba07d80, _cmd=<optimized out>, place=NSWindowAbove, otherWin=-1) at NSWindow.m:1932
#15 0x00007f4a06a07901 in -[NSWindow makeKeyAndOrderFront:] (self=0x56535ba07d80, _cmd=<optimized out>, sender=<optimized out>) at NSWindow.m:1760
#16 0x00007f4a05faee26 in -[GSArray makeObjectsPerformSelector:withObject:] (self=0x56535a956d50, _cmd=<optimized out>, aSelector=0x7f4a06ba7730 <_OBJC_SELECTOR_TABLE+1072>, argument=0x56535a7f8b30) at GSArray.m:346
#17 0x00007f4a068d4706 in -[NSDocumentController openUntitledDocumentAndDisplay:error:] (self=0x56535b5416c0, _cmd=<optimized out>, display=<optimized out>, err=0x7fff21379c90) at NSDocumentController.m:621
#18 0x00007f4a068d58a5 in -[NSDocumentController newDocument:] (self=0x56535b5416c0, _cmd=<optimized out>, sender=<optimized out>) at NSDocumentController.m:993
#19 0x00007f4a0685ec44 in -[NSApplication sendAction:to:from:] (self=self@entry=0x56535a88aa60, _cmd=_cmd@entry=0x7f4a06bfbcd0 <_OBJC_SELECTOR_TABLE+2832>, aSelector=aSelector@entry=0x7f4a06babb50 <_OBJC_SELECTOR_TABLE+1968>, aTarget=0x0, sender=sender@entry=0x56535b1ceb20) at NSApplication.m:2273
#20 0x00007f4a06938b7d in -[NSMenu performActionForItemAtIndex:] (self=0x56535b1cab80, _cmd=<optimized out>, index=<optimized out>) at NSMenu.m:1395
#21 0x00007f4a06942ebc in -[NSMenuView _trackWithEvent:startingMenuView:] (self=<optimized out>, _cmd=<optimized out>, event=<optimized out>, mainWindowMenuView=<optimized out>) at NSMenuView.m:1925
#22 0x00007f4a0694037b in -[NSMenuView trackWithEvent:] (self=0x56535b1dacc0, _cmd=<optimized out>, event=0x56535a957910) at NSMenuView.m:1961
#23 0x00007f4a06940591 in -[NSMenuView mouseDown:] (self=0x56535b1dacc0, _cmd=<optimized out>, theEvent=0x56535a957910) at NSMenuView.m:2001
#24 0x00007f4a06a16f8e in -[NSWindow sendEvent:] (self=0x56535a7ee820, _cmd=<optimized out>, theEvent=0x56535a957910) at NSWindow.m:4154
#25 0x00007f4a06865514 in -[NSApplication run] (self=0x56535a88aa60, _cmd=<optimized out>) at NSApplication.m:1585
#26 0x00007f4a06843fe2 in NSApplicationMain (argc=<optimized out>, argv=<optimized out>) at Functions.m:119
#27 0x00007f4a05c4eefd in __libc_start_main (main=0x5653272f8930 <main>, argc=1, argv=0x7fff2137a158, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff2137a148) at ../csu/libc-start.c:311
#28 0x00005653272f896a in _start () at ../sysdeps/x86_64/start.S:120