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

[martin rudalics]

> If you run Emacs in X synchronized mode and put a breakpoint on
> x_error_quitter, can you see why the problem happens?  Which picmap
> parameter is invalid?

No idea how to run a TTY Emacs in X synchronized mode.  Anyway the
backtrace without doing that seems quite clear


#0  x_error_quitter (display=0xea2a40, event=0x7fffb0f542c0) at 
../../src/xterm.c:9856
#1  0x000000000054763f in x_error_handler (display=0xea2a40, 
event=0x7fffb0f542c0) at ../../src/xterm.c:9828
#2  0x00007f8dfad1229a in _XError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#3  0x00007f8dfad0f5c1 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#4  0x00007f8dfad0f605 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#5  0x00007f8dfad101f8 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#6  0x00007f8dfad05a1d in XQueryColor () from 
/usr/lib/x86_64-linux-gnu/libX11.so.6
#7  0x00007f8dfbaf25fc in Xaw3dComputeTopShadowRGB () from 
/usr/lib/x86_64-linux-gnu/libXaw3d.so.6
#8  0x00007f8dfbaf26f0 in ?? () from /usr/lib/x86_64-linux-gnu/libXaw3d.so.6
#9  0x00007f8dfbaf2b5a in ?? () from /usr/lib/x86_64-linux-gnu/libXaw3d.so.6
#10 0x00007f8dfb657490 in ?? () from /usr/lib/x86_64-linux-gnu/libXt.so.6
#11 0x00007f8dfb65745a in ?? () from /usr/lib/x86_64-linux-gnu/libXt.so.6
#12 0x00007f8dfb657e5f in ?? () from /usr/lib/x86_64-linux-gnu/libXt.so.6
#13 0x00007f8dfb6582ab in _XtCreateWidget () from 
/usr/lib/x86_64-linux-gnu/libXt.so.6
#14 0x00007f8dfb6585ce in XtCreateWidget () from 
/usr/lib/x86_64-linux-gnu/libXt.so.6
#15 0x000000000053eeef in x_create_toolkit_scroll_bar (f=0x15cb3f0, 
bar=0x15f1a88) at ../../src/xterm.c:6005
#16 0x000000000053fbc1 in x_scroll_bar_create (w=0x15e36f0, top=667, left=1, 
width=16, height=18, horizontal=false) at ../../src/xterm.c:6492
#17 0x00000000005405f4 in XTset_vertical_scroll_bar (w=0x15e36f0, portion=0, 
whole=0, position=0) at ../../src/xterm.c:6746
#18 0x000000000046b431 in set_vertical_scroll_bar (w=0x15e36f0) at 
../../src/xdisp.c:16352
#19 0x000000000046fabc in redisplay_window (window=..., just_this_one_p=false) 
at ../../src/xdisp.c:17506
#20 0x0000000000465a20 in redisplay_window_0 (window=...) at 
../../src/xdisp.c:14778
#21 0x000000000062e5f7 in internal_condition_case_1 (bfun=0x4659de 
<redisplay_window_0>, arg=..., handlers=..., hfun=0x4659a6 
<redisplay_window_error>) at ../../src/eval.c:1343
#22 0x000000000046597c in redisplay_windows (window=...) at 
../../src/xdisp.c:14758
#23 0x0000000000464373 in redisplay_internal () at ../../src/xdisp.c:14247
#24 0x000000000046505a in redisplay_preserve_echo_area (from_where=12) at 
../../src/xdisp.c:14577
#25 0x0000000000693238 in wait_reading_process_output (time_limit=30, nsecs=0, 
read_kbd=-1, do_display=true, wait_for_cell=..., wait_proc=0x0, 
just_wait_proc=0) at ../../src/process.c:5620
#26 0x000000000041e817 in sit_for (timeout=..., reading=true, display_option=1) 
at ../../src/dispnew.c:5763
#27 0x000000000057bcfc in read_char (commandflag=1, map=..., prev_event=..., 
used_mouse_menu=0x7fffb0f5968f, end_time=0x0) at ../../src/keyboard.c:2724
#28 0x000000000058b988 in read_key_sequence (keybuf=0x7fffb0f59830, bufsize=30, 
prompt=..., dont_downcase_last=false, can_return_switch_frame=true, 
fix_current_buffer=true, prevent_redisplay=false) at ../../src/keyboard.c:9151
#29 0x0000000000577dea in command_loop_1 () at ../../src/keyboard.c:1372
#30 0x000000000062e51d in internal_condition_case (bfun=0x5779ad <command_loop_1>, 
handlers=..., hfun=0x576fe0 <cmd_error>) at ../../src/eval.c:1319
#31 0x000000000057759e in command_loop_2 (ignore=...) at 
../../src/keyboard.c:1114
#32 0x000000000062da19 in internal_catch (tag=..., func=0x577575 
<command_loop_2>, arg=...) at ../../src/eval.c:1084
#33 0x0000000000577540 in command_loop () at ../../src/keyboard.c:1093
#34 0x0000000000576ae7 in recursive_edit_1 () at ../../src/keyboard.c:699
#35 0x0000000000576cce in Frecursive_edit () at ../../src/keyboard.c:770
#36 0x00000000005749d6 in main (argc=3, argv=0x7fffb0f59d18) at 
../../src/emacs.c:1706

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


and is, BTW, the same as in the 2014 build.  Apparently, the shadow
calculations for the Xaw3D scroll bars, when done from a TTY-started
server, are sometimes not digested by X11.  I see no problems with a
GUI-started server.

martin