bug#16751: 24.3.50; Export during Org export to HTML

[Eli Zaretskii]

> From: "Sebastien Vauban" <sva-news@mygooglest.com>
> Date: Fri, 14 Feb 2014 10:17:02 +0100
> 
> I have an Emacs crash (reproducible for now, at least with one Org file)
> when exporting it to HTML.
> 
> Here is the backtrace.

Thanks.  However, you are working with a very old binary, before all
the file-name related code for MS-Windows was revamped to support
Unicode APIs.  So I'm not sure this crash is relevant anymore, as the
code changed quite a bit.

Nonetheless, since you say you can reproduce this, please provide the
information requested below, in case the underlying reason is still
valid:

> Thread 1 (Thread 604.0x4fb4):
> #0  0x77ae9bfd in KERNELBASE!DebugBreak () from 
> /cygdrive/c/Windows/SYSTEM32/KERNELBASE.dll
> #1  0x011ec39c in emacs_abort () at 
> c:/msys/home/dani/emacs/repo/src/w32fns.c:7984
> #2  0x01122321 in Fexpand_file_name (name=100535361, 
> default_directory=96023889) at c:/msys/home/dani/emacs/repo/src/fileio.c:1450

In this frame #2, the one in Fexpand_file_name, please show the result
of these commands:

 (gdb) source .gdbinit

If you don't have a .gdbinit file, you can find it here:

  http://bzr.savannah.gnu.org/lh/emacs/trunk/annotate/head:/src/.gdbinit

You need to let GDB read .gdbinit, because otherwise the x* commands
below will not work.

 (gdb) p name
 (gdb) xstring
 (gdb) p default_directory
 (gdb) xtype

If the last command says it's a symbol, follow it with

 (gdb) xsymbol

If it "xtype" says it's a string, follow with

 (gdb) xstring

Please show what these commands display.  Also, do you have the
w32-downcase-file-names option set non-nil?

Alternatively, if you can find where in Lisp is this expand-file-name
call, add 'message' there, or step through that code with Edebug, to
show the arguments passed to expand-file-name.