bug#27816: 26.0.50; X protocol error: BadPixmap (invalid Pixmap parameter) on protocol request 55

[npostavs]

I don't get the Xaw3dComputeTopShadowRGB in my backtrace like Martin does:

Thread 1 "emacs" hit Breakpoint 3, x_error_quitter (display=0x2ea8ff0, 
event=0x7fffffff8df0)
    at ../../emacs-master/src/xterm.c:9849
9849      if (event->error_code == BadName)
(gdb) bt
#0  0x000000000054b168 in x_error_quitter (display=0x2ea8ff0, 
event=0x7fffffff8df0)
    at ../../emacs-master/src/xterm.c:9849
#1  0x000000000054b148 in x_error_handler (display=0x2ea8ff0, 
event=0x7fffffff8df0)
    at ../../emacs-master/src/xterm.c:9828
#2  0x00007ffff66e36fd in _XError () at /usr/lib/libX11.so.6
#3  0x00007ffff66e0627 in  () at /usr/lib/libX11.so.6
#4  0x00007ffff66e06e5 in  () at /usr/lib/libX11.so.6
#5  0x00007ffff66e15f8 in _XReply () at /usr/lib/libX11.so.6
#6  0x00007ffff66dcfed in XSync () at /usr/lib/libX11.so.6
#7  0x00007ffff66dd08b in  () at /usr/lib/libX11.so.6
#8  0x00007ffff66c01da in XCreateGC () at /usr/lib/libX11.so.6
#9  0x00007ffff7039d2c in XtAllocateGC () at /usr/lib/libXt.so.6
#10 0x00007ffff74ce84a in  () at /usr/lib/libXaw.so.7
#11 0x00007ffff74cecfc in  () at /usr/lib/libXaw.so.7
#12 0x00007ffff703192c in  () at /usr/lib/libXt.so.6
#13 0x00007ffff70322c8 in  () at /usr/lib/libXt.so.6
#14 0x00007ffff7032718 in _XtCreateWidget () at /usr/lib/libXt.so.6
#15 0x00007ffff70329fd in XtCreateWidget () at /usr/lib/libXt.so.6
#16 0x0000000000542d6f in x_create_toolkit_scroll_bar (f=0x15c7c30 
<bss_sbrk_buffer+8094096>, bar=0x1351fa8 <bss_sbrk_buffer+5514504>) at 
../../emacs-master/src/xterm.c:6005
#17 0x00000000005438e6 in x_scroll_bar_create (w=0x1676c30 
<bss_sbrk_buffer+8810896>, top=37, left=1, width=16, height=768, 
horizontal=false) at ../../emacs-master/src/xterm.c:6492
#18 0x00000000005442c0 in XTset_vertical_scroll_bar (w=0x1676c30 
<bss_sbrk_buffer+8810896>, portion=145, whole=145, position=0) at 
../../emacs-master/src/xterm.c:6746
#19 0x000000000046e131 in set_vertical_scroll_bar (w=0x1676c30 
<bss_sbrk_buffer+8810896>)
    at ../../emacs-master/src/xdisp.c:16351
#20 0x0000000000472782 in redisplay_window (window=XIL(0x1676c35), 
just_this_one_p=false)
    at ../../emacs-master/src/xdisp.c:17506
#21 0x0000000000468921 in redisplay_window_0 (window=XIL(0x1676c35))
    at ../../emacs-master/src/xdisp.c:14778
#22 0x0000000000636815 in internal_condition_case_1 (bfun=0x4688df 
<redisplay_window_0>, arg=XIL(0x1676c35), handlers=XIL(0xe79df3), hfun=0x4688a7 
<redisplay_window_error>)
    at ../../emacs-master/src/eval.c:1343
#23 0x000000000046887c in redisplay_windows (window=XIL(0x1676c35))
    at ../../emacs-master/src/xdisp.c:14758
#24 0x00000000004672a0 in redisplay_internal () at 
../../emacs-master/src/xdisp.c:14247
#25 0x0000000000467f6e in redisplay_preserve_echo_area (from_where=12)
    at ../../emacs-master/src/xdisp.c:14577
#26 0x000000000069adbb in wait_reading_process_output (time_limit=30, nsecs=0, 
read_kbd=-1, do_display=true, wait_for_cell=XIL(0), wait_proc=0x0, 
just_wait_proc=0) at ../../emacs-master/src/process.c:5620
#27 0x00000000004225fd in sit_for (timeout=make_number(30), reading=true, 
display_option=1)
    at ../../emacs-master/src/dispnew.c:5763
#28 0x000000000058691c in read_char (commandflag=1, map=XIL(0x1745dd3), 
prev_event=XIL(0), used_mouse_menu=0x7fffffffe28f, end_time=0x0) at 
../../emacs-master/src/keyboard.c:2724
#29 0x00000000005960a2 in read_key_sequence (keybuf=0x7fffffffe420, bufsize=30, 
prompt=XIL(0), dont_downcase_last=false, can_return_switch_frame=true, 
fix_current_buffer=true, prevent_redisplay=false)
    at ../../emacs-master/src/keyboard.c:9151
#30 0x0000000000582aaf in command_loop_1 () at 
../../emacs-master/src/keyboard.c:1372
#31 0x000000000063673e in internal_condition_case (bfun=0x58267c 
<command_loop_1>, handlers=XIL(0x51f0), hfun=0x581cd2 <cmd_error>) at 
../../emacs-master/src/eval.c:1319
#32 0x0000000000582281 in command_loop_2 (ignore=XIL(0)) at 
../../emacs-master/src/keyboard.c:1114
#33 0x0000000000635c7b in internal_catch (tag=XIL(0xc510), func=0x582258 
<command_loop_2>, arg=XIL(0))
    at ../../emacs-master/src/eval.c:1084
#34 0x0000000000582223 in command_loop () at 
../../emacs-master/src/keyboard.c:1093
#35 0x00000000005817e7 in recursive_edit_1 () at 
../../emacs-master/src/keyboard.c:699
#36 0x00000000005819c6 in Frecursive_edit () at 
../../emacs-master/src/keyboard.c:770
#37 0x000000000057f653 in main (argc=9, argv=0x7fffffffe8f8) at 
../../emacs-master/src/emacs.c:1706

Lisp Backtrace:
"redisplay_internal (C function)" (0x0)