bug#841: 23.0.60; ediff-merge-revision: Buffer exceeds maximum size

[Michael Kifer <kifer@cs.sunysb.edu>]

On Sun, 31 Aug 2008 15:40:21 +0200
"Lennart Borgman (gmail)" <lennart.borgman@gmail.com> wrote:

> When I just made a checkout of Emacs from CVS I got a merge conflict
> which I used ediff-revision to resolve. I then got the following back
> trace when I did "wb" to save the corrected file:
> 
> Debugger entered--Lisp error: (error "Buffer exceeds maximum size")
>   call-process("diff" nil #<buffer *ediff-custom-diff*> nil "-c"

This says that the output of diff -c exceeds the buffer size.

It is unclear how this is related to ediff per se, since ediff merely calls
call-process with the above command.

> "c:/DOCUME~1/LENNAR~1/LOCALS~1/Temp/ediff282470M"
> "c:/ecvsnew/bld/emacs/src/w32term.c")
>   apply(call-process "diff" nil #<buffer *ediff-custom-diff*> nil ("-c"
> "c:/DOCUME~1/LENNAR~1/LOCALS~1/Temp/ediff282470M"
> "c:/ecvsnew/bld/emacs/src/w32term.c"))
>   ediff-exec-process("diff" #<buffer *ediff-custom-diff*> synchronize
> "-c" "c:/DOCUME~1/LENNAR~1/LOCALS~1/Temp/ediff282470M"
> "c:/ecvsnew/bld/emacs/src/w32term.c")
>   ediff-compute-custom-diffs-maybe()
>   ediff-save-buffer(nil)
>   call-interactively(ediff-save-buffer nil nil)
> 
> Looking into ediff-custom-diff I can see there is some problem with ^M:

Can you explain what the problem is? It is unclear from the included text below.

In any case, I deed to be able to reproduce it in order to be able to determine
if something needs to be fixed in ediff. Right now it does not look like
an ediff problem.

michael


> ! 	emacs_event->part = scroll_bar_handle;
> ! 	y = 0;
> ! 	break;
>         case SB_BOTTOM:
> ! 	emacs_event->part = scroll_bar_handle;
> ! 	y = top_range;
> ! 	break;
>         case SB_THUMBTRACK:
>         case SB_THUMBPOSITION:
> ! 	if (VERTICAL_SCROLL_BAR_TOP_RANGE (f, XINT (bar->height)) <= 0xffff)
>             y = HIWORD (msg->msg.wParam);
> 
> ! 	bar->dragging = Qt;
> 
> ! 	emacs_event->part = scroll_bar_handle;
> 
> 
> 
> ! 	/* "Silently" update current position.  */
> 
> ! 	{
> 
> ! 	  SCROLLINFO si;
> 
> 
> 
> 
> This was with my patched version, but I do not think I have any patches
> that comes in here:
> 
> In GNU Emacs 23.0.60.1 (i386-mingw-nt5.1.2600)
>  of 2008-08-28 (patched)
> Windowing system distributor `Microsoft Corp.', version 5.1.2600
> configured using `configure --with-gcc (3.4) --cflags -Ic:/g/include'
> 
>