Re: 23.0.50; Crash in ediff-regions-linewise

[Toby Allsopp]

Stefan Monnier <address@hidden> writes:

>>>>>> "Toby" == Toby Allsopp <address@hidden> writes:
>
>> It appears that Fmake_indirect_buffer creates a buffer object that is
>> invalid in some way.  This then fails a bufferp check and results in
>> an error containing the invalid buffer object.
>
> Can you try the patch below?

This patch fixes the problem for me (with both ediff-regions-linewise
and clone-indirect-buffer-other-window).  Yay!

> BTW recompiling with -DENABLE_CHECKING should catch these problems earlier
> and with a more explicit failure.

This makes temacs die due to a failed assertion.  See below for
details.  I'm out of time to look into this further at the moment.

Toby.


Starting program: /usr/local/src/emacs-cvs/build/src/temacs -batch -l loadup
[Thread debugging using libthread_db enabled]
[New Thread 0x2b82085ac560 (LWP 32544)]
Loading loadup.el (source)...
Using load-path (/usr/local/src/emacs-cvs/emacs/lisp)
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Lists of integers (garbage collection statistics) are normal output
while building Emacs; they do not indicate a problem.
((11339 . 8589) (4943 . 0) (586 . 12) 15720 20090 (11 . 7) (18 . 0) (821 . 
1938))
Loading loaddefs.el (source)...
((29345 . 10742) (7911 . 0) (595 . 10) 41809 20090 (37 . 33) (18 . 0) (3687 . 
1304))
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((49538 . 11102) (10858 . 0) (632 . 28) 63071 164121 (67 . 3) (19 . 12) (4954 . 
1494))
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((56002 . 4638) (11387 . 0) (634 . 26) 75252 166051 (67 . 3) (19 . 12) (5461 . 
1514))
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Emacs fatal error: /usr/local/src/emacs-cvs/emacs/src/alloc.c:4967: assertion 
failed: (XVECTOR (obj)->size & (PSEUDOVECTOR_FLAG | PVEC_TYPE_MASK)) == 
(PSEUDOVECTOR_FLAG | (PVEC_COMPILED))

Program received signal SIGABRT, Aborted.
[Switching to Thread 0x2b82085ac560 (LWP 32544)]
0x00002b82079a9ac7 in kill () from /lib/libc.so.6
(gdb) bt
#0  0x00002b82079a9ac7 in kill () from /lib/libc.so.6
#1  0x0000000000590f75 in abort () at 
/usr/local/src/emacs-cvs/emacs/src/emacs.c:431
#2  0x000000000064a7d6 in die (msg=0x799d78 "assertion failed: (XVECTOR 
(obj)->size & (PSEUDOVECTOR_FLAG | PVEC_TYPE_MASK)) == (PSEUDOVECTOR_FLAG | 
(PVEC_COMPILED))", file=0x799160 "/usr/local/src/emacs-cvs/emacs/src/alloc.c", 
line=4967) at /usr/local/src/emacs-cvs/emacs/src/alloc.c:6302
#3  0x0000000000646b17 in Fpurecopy (obj=17537668) at 
/usr/local/src/emacs-cvs/emacs/src/alloc.c:4967
#4  0x00000000006469f0 in Fpurecopy (obj=17448324) at 
/usr/local/src/emacs-cvs/emacs/src/alloc.c:4965
#5  0x0000000000643a0f in Fmake_byte_code (nargs=4, args=0x10a3f90) at 
/usr/local/src/emacs-cvs/emacs/src/alloc.c:3172
#6  0x00000000006a6fe1 in read1 (readcharfun=12988177, pch=0x7fffa7c2103c, 
first_in_list=0) at /usr/local/src/emacs-cvs/emacs/src/lread.c:2270
#7  0x00000000006a9132 in read_list (flag=-1, readcharfun=12988177) at 
/usr/local/src/emacs-cvs/emacs/src/lread.c:3166
#8  0x00000000006a4c76 in readevalloop (readcharfun=12988177, stream=0x1043960, 
sourcename=17016467, evalfun=0x671a52 <Feval>, printflag=0, unibyte=12847505, 
readfun=12847505, start=12847505, end=12847505) at 
/usr/local/src/emacs-cvs/emacs/src/lread.c:1529
#9  0x00000000006a2c6b in Fload (file=13905283, noerror=12847505, 
nomessage=12847505, nosuffix=12847505, must_suffix=12847505) at 
/usr/local/src/emacs-cvs/emacs/src/lread.c:1029
#10 0x0000000000672791 in Feval (form=15964597) at 
/usr/local/src/emacs-cvs/emacs/src/eval.c:2376
#11 0x000000000066d844 in Fprogn (args=15964645) at 
/usr/local/src/emacs-cvs/emacs/src/eval.c:450
#12 0x0000000000672053 in Feval (form=15964037) at 
/usr/local/src/emacs-cvs/emacs/src/eval.c:2309
#13 0x000000000066d6a3 in Fif (args=15963685) at 
/usr/local/src/emacs-cvs/emacs/src/eval.c:398
#14 0x0000000000672053 in Feval (form=15941957) at 
/usr/local/src/emacs-cvs/emacs/src/eval.c:2309
#15 0x00000000006a4e84 in readevalloop (readcharfun=12988177, stream=0xcabea0, 
sourcename=13276531, evalfun=0x671a52 <Feval>, printflag=0, unibyte=12847505, 
readfun=12847505, start=12847505, end=12847505) at 
/usr/local/src/emacs-cvs/emacs/src/lread.c:1562
#16 0x00000000006a2c6b in Fload (file=13276275, noerror=12847505, 
nomessage=12847505, nosuffix=12847505, must_suffix=12847505) at 
/usr/local/src/emacs-cvs/emacs/src/lread.c:1029
#17 0x0000000000672791 in Feval (form=13153013) at 
/usr/local/src/emacs-cvs/emacs/src/eval.c:2376
#18 0x0000000000595bbe in top_level_2 () at 
/usr/local/src/emacs-cvs/emacs/src/keyboard.c:1405
#19 0x000000000066fd86 in internal_condition_case (bfun=0x595bae <top_level_2>, 
handlers=12961697, hfun=0x59566a <cmd_error>) at 
/usr/local/src/emacs-cvs/emacs/src/eval.c:1493
#20 0x0000000000595bed in top_level_1 () at 
/usr/local/src/emacs-cvs/emacs/src/keyboard.c:1413
#21 0x000000000066f685 in internal_catch (tag=12935537, func=0x595bc0 
<top_level_1>, arg=12847505) at /usr/local/src/emacs-cvs/emacs/src/eval.c:1229
#22 0x0000000000595b38 in command_loop () at 
/usr/local/src/emacs-cvs/emacs/src/keyboard.c:1368
#23 0x0000000000594c48 in recursive_edit_1 () at 
/usr/local/src/emacs-cvs/emacs/src/keyboard.c:984
#24 0x00000000005951e4 in Frecursive_edit () at 
/usr/local/src/emacs-cvs/emacs/src/keyboard.c:1046
#25 0x0000000000592dfe in main (argc=4, argv=0x7fffa7c226f8) at 
/usr/local/src/emacs-cvs/emacs/src/emacs.c:1778

Lisp Backtrace:
"load" (0xa7c21520)
"progn" (0xa7c21798)
"if" (0xa7c21948)
"load" (0xa7c21df0)