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bug#9723: 24.0.50; Emacs Clipboard crash


From: Joseph Jones
Subject: bug#9723: 24.0.50; Emacs Clipboard crash
Date: Sat, 11 Feb 2012 11:06:51 -0800

Another data point with this build:

1) In GUI mode (I think mostly when connected over RDP), eventually Emacs will 
lock up using 12.5% CPU and not even running it under GDB will  let me break 
into the process to see what is up.

24 is almost useless for me right now, at least when working remotely (which I 
have to do to connected to some of my machines). It would suck to have to 
abandon Emacs on Windows. I have NEVER had Emacs crash on any other platform in 
almost 20 years of usage (really lucky I guess) but the last 5 months have seen 
it almost unusable. :-(

-----Original Message-----
From: Joseph Jones 
Sent: Saturday, February 11, 2012 10:49 AM
To: 'Eli Zaretskii'
Cc: address@hidden
Subject: RE: bug#9723: 24.0.50; Emacs Clipboard crash

Eli,

Emacs 24.0.92, built 1/22/2012

Getting back to the original issue, I can reproduce the clipboard crash 100% 
running Emacs -nw in a command prompt. Here is the thread and bt info I have 
right now:

[Switching to thread 51 (Thread 8980.0x1390)]#0  0x7d61c846 in ?? ()
(gdb) bt
#0  0x7d61c846 in ?? ()
#1  0x7d4d8c0d in RegisterWaitForInputIdle () from 
C:\WINDOWS\syswow64\kernel32.dll
#2  0x00000230 in ?? ()
#3  0xffffffff in ?? ()
#4  0x00000000 in ?? ()
(gdb) t 3
[Switching to thread 3 (Thread 8980.0x2164)]#0  0x7d61c846 in ?? ()
(gdb) bt
#0  0x7d61c846 in ?? ()
#1  0x7d4d8c0d in RegisterWaitForInputIdle () from 
C:\WINDOWS\syswow64\kernel32.dll
#2  0x00000248 in ?? ()
#3  0xffffffff in ?? ()
#4  0x00000000 in ?? ()
(gdb) t 2
[Switching to thread 2 (Thread 8980.0x1b48)]#0  0x7d61d06f in ?? ()
(gdb) bt
#0  0x7d61d06f in ?? ()
#1  0x7d63f948 in ?? ()
#2  0x7d4dfe37 in KERNEL32!GetConsoleOutputCP () from 
C:\WINDOWS\syswow64\kernel32.dll
#3  0x00000000 in ?? ()
(gdb) t 1
[Switching to thread 1 (Thread 8980.0x2040)]#0  0x01259f9f in append_glyph 
(it=0x82ad3c) at term.c:1491
1491    term.c: No such file or directory.
        in term.c
(gdb) bt
#0  0x01259f9f in append_glyph (it=0x82ad3c) at term.c:1491
#1  0x0125a221 in produce_glyphs (it=0x82ad3c) at term.c:1576
#2  0x0125bb74 in produce_special_glyphs (it=0x82b604, what=IT_TRUNCATION) at 
term.c:1946
#3  0x0120dc3d in insert_left_trunc_glyphs (it=0x82c890) at xdisp.c:17934
#4  0x012125ec in display_line (it=0x82c890) at xdisp.c:19369
#5  0x01207dba in try_window (window=54815237, pos=..., flags=1) at 
xdisp.c:15955
#6  0x012059da in redisplay_window (window=54815237, just_this_one_p=0) at 
xdisp.c:15480
#7  0x011ff611 in redisplay_window_0 (window=54815237) at xdisp.c:13603
#8  0x01032c47 in internal_condition_case_1 (bfun=0x11ff5de 
<redisplay_window_0>, arg=54815237, handlers=54725470,
    hfun=0x11ff5bd <redisplay_window_error>) at eval.c:1537
#9  0x011ff5a4 in redisplay_windows (window=54815237) at xdisp.c:13583
#10 0x011fda72 in redisplay_internal () at xdisp.c:13160
#11 0x011feab7 in redisplay_preserve_echo_area (from_where=12) at xdisp.c:13411
#12 0x0104bd28 in wait_reading_process_output (time_limit=60, microsecs=0, 
read_kbd=-1, do_display=1, wait_for_cell=54741018,
    wait_proc=0x0, just_wait_proc=0) at process.c:4854
#13 0x010f87ce in sit_for (timeout=240, reading=1, do_display=1) at 
dispnew.c:6060
#14 0x010091b1 in read_char (commandflag=1, nmaps=6, maps=0x82f9a0, 
prev_event=54741018, used_mouse_menu=0x82fa88,
    end_time=0x0) at keyboard.c:2688
#15 0x0101c1d2 in read_key_sequence (keybuf=0x82fc04, bufsize=30, 
prompt=54741018, dont_downcase_last=0,
    can_return_switch_frame=1, fix_current_buffer=1) at keyboard.c:9300
#16 0x01005c17 in command_loop_1 () at keyboard.c:1448
#17 0x01032b5f in internal_condition_case (bfun=0x100561f <command_loop_1>, 
handlers=54798746, hfun=0x1004e3e <cmd_error>)
    at eval.c:1499
#18 0x0100527b in command_loop_2 (ignore=54741018) at keyboard.c:1159
#19 0x01032582 in internal_catch (tag=54796770, func=0x1005257 
<command_loop_2>, arg=54741018) at eval.c:1256
#20 0x01005237 in command_loop () at keyboard.c:1138
#21 0x01004813 in recursive_edit_1 () at keyboard.c:758
#22 0x01004b2e in Frecursive_edit () at keyboard.c:822
#23 0x01002839 in main (argc=2, argv=0xb04a28) at emacs.c:1715
(gdb)

I realize this doesn't say anything about clipboard, but if I run it without 
GDB attached, that is the error alert box I get.

---------------------------
Emacs Clipboard: emacs.exe - Application Error
---------------------------
The exception unknown software exception (0xc0000005) occurred in the 
application at location 0x01259f9f.


Click on OK to terminate the program
Click on CANCEL to debug the program
---------------------------
OK   Cancel   
---------------------------

-----Original Message-----
From: Eli Zaretskii [mailto:address@hidden
Sent: Sunday, February 05, 2012 10:22 AM
To: martin rudalics
Cc: address@hidden; Joseph Jones; address@hidden
Subject: Re: bug#9723: 24.0.50; Emacs Clipboard crash

> Date: Sun, 05 Feb 2012 19:16:28 +0100
> From: martin rudalics <address@hidden>
> CC: Eli Zaretskii <address@hidden>, address@hidden, 
> address@hidden
> 
>  > It does, to stderr of the inferior.
> 
> How can I look at "stderror of the inferior" after M-x gdb?

You can't, not on Windows.





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