Re: old bootstrap error emerges again

[Dieter Deyke]

Eli Zaretskii <address@hidden> writes:

>> From: Dieter Deyke <address@hidden>
>> Cc: address@hidden, address@hidden
>> Date: Sat, 25 Mar 2006 08:54:45 -0700
>>
>> The strange thing is that the error vanished yesterday on my work PC,
>> but using the same tools I still get it on my home PC:
>
> Do you have the same sources (i.e. the same CVS check-out) on both of
> these machines?

I'm not sure, but I guess so. The error vanished on my work PC with
CVS sources from yesterday afternoon, and it is still here on my home
PC with CVS sources from this morning.

>
>> Starting program: C:\Users\deyke\emacs-build\work\lisp/../bin/my-emacs.exe 
>> -batc
>> h --no-init-file --no-site-file --multibyte -f batch-byte-compile 
>> url/vc-dav.el
>>
>> Breakpoint 3, get_doc_string (filepos=-2581128, unibyte=0, definition=0)
>>     at doc.c:196
>> 196             error ("Cannot open doc string file \"%s\"", name);
>> (gdb) up 1
>> #1  0x0110da05 in Fdocumentation (function=27819993, raw=27674673) at 
>> doc.c:456
>> 456           tem = get_doc_string (doc, 0, 0);
>> (gdb) print function
>> $1 = 27819993
>> (gdb) xtype
>> Lisp_Symbol
>> (gdb) xsymbol
>> $2 = (struct Lisp_Symbol *) 0x1a87fd8
>> "file-exists-p"
>> (gdb)
>
> Thanks.  Now please repeat this again, and this time put a breakpoint
> in Fdocumentation; when it breaks, verify that the first argument is
> indeed file-exists-p, and then step through the code until it calls
> get_doc_string and tell me what you saw.  When I do that on my system,
> what I see is below.  As you see, Fdocumentation returns nil without
> ever calling get_doc_string.  Can you find out what is different on
> your machine, and why?
>
>> As for your last question, I'm not using MSYS. My setup includes:
>>
>> english XP Pro SP2
>> current cygwin
>> MinGW-3.1.0-1 in PATH before cygwin
>
> Okay, so perhaps Cygwin has something to do with this.  Hopefully, we
> will understand that when we find the reason for the different
> behavior.
>
> Here's a transcript of the GDB session on my machine:
>
> D:\gnu\test\emacs\lisp>gdb ../bin/bootstrap-emacs.exe
> GNU gdb 6.3
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for details.
> This GDB was configured as "i686-pc-mingw32"...
> (gdb) br Fdocumentation
> Breakpoint 1 at 0x10fc4e0: file doc.c, line 378.
> (gdb) source ../src/.gdbinit
> Environment variable "DISPLAY" not defined.
> Environment variable "TERM" not defined.
> Breakpoint 2 at 0x1133856: file w32fns.c, line 8965.
> Breakpoint 3 at 0x109513b: file sysdep.c, line 1395.
> (gdb) del 2 3
> (gdb) r -batch  --no-init-file --no-site-file --multibyte -l loaddefs.el -f 
> batc
> h-byte-compile url/vc-dav.el
> Starting program: D:\gnu\test\emacs\lisp/../bin/bootstrap-emacs.exe -batch  
> --no
> -init-file --no-site-file --multibyte -l loaddefs.el -f batch-byte-compile 
> url/v
> c-dav.el
> Loading subst-ksc...
> Loading subst-gb2312...
> Loading subst-big5...
> Loading subst-jis...
>
> Breakpoint 1, Fdocumentation (function=44196825, raw=44054577) at doc.c:378
> 378       int try_reload = 1;
> (gdb) p function
> $1 = 44196825
> (gdb) xtype
> Lisp_Symbol
> (gdb) xsymbol
> $2 = (struct Lisp_Symbol *) 0x2a263d8
> "file-exists-p"
> (gdb) n
> 374     {
> (gdb) n
> 384       if (SYMBOLP (function)
> (gdb)
> 382       doc = Qnil;
> (gdb)
> 384       if (SYMBOLP (function)
> (gdb)
> 382       doc = Qnil;
> (gdb)
> 384       if (SYMBOLP (function)
> (gdb)
> 389       fun = Findirect_function (function, Qnil);
> (gdb)
> 390       if (SUBRP (fun))
> (gdb)
> 392           if (XSUBR (fun)->doc == 0)
> (gdb)
> 409             return Qnil;
> (gdb)
> 477     }
> (gdb)

Breakpoint 4, Fdocumentation (function=27819993, raw=27674673) at doc.c:378
378       int try_reload = 1;
(gdb) p function
$3 = 27819993
(gdb) xtype
Lisp_Symbol
(gdb) xsymbol
$4 = (struct Lisp_Symbol *) 0x1a87fd8
"file-exists-p"
(gdb) n
374     {
(gdb) n
384       if (SYMBOLP (function)
(gdb)
382       doc = Qnil;
(gdb)
384       if (SYMBOLP (function)
(gdb)
382       doc = Qnil;
(gdb)
384       if (SYMBOLP (function)
(gdb)
389       fun = Findirect_function (function, Qnil);
(gdb)
390       if (SUBRP (fun))
(gdb)
392           if (XSUBR (fun)->doc == 0)
(gdb)
394           else if ((EMACS_INT) XSUBR (fun)->doc >= 0)
(gdb)
397             doc = make_number ((EMACS_INT) XSUBR (fun)->doc);
(gdb)
451       if (EQ (doc, make_number (0)))
(gdb)
453       if (INTEGERP (doc) || CONSP (doc))
(gdb)
456           tem = get_doc_string (doc, 0, 0);
(gdb)

Breakpoint 3, get_doc_string (filepos=-2581128, unibyte=0, definition=0)
    at doc.c:196
196             error ("Cannot open doc string file \"%s\"", name);
(gdb)

--
Dieter Deyke
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