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Re: Emacs (HEAD) crash on M$ (XP) built with MinGW

From: dhruva
Subject: Re: Emacs (HEAD) crash on M$ (XP) built with MinGW
Date: Sat, 25 Oct 2008 22:26:02 +0530


On Sat, Oct 25, 2008 at 10:21 PM, dhruva <address@hidden> wrote:
> Hi,
> On Tue, Oct 21, 2008 at 2:00 PM, Eli Zaretskii <address@hidden> wrote:
>>> Date: Tue, 21 Oct 2008 13:25:38 +0530
>>> From: dhruva <address@hidden>
>>> Cc: "Eli Zaretskii" <address@hidden>, address@hidden
>>> > FWIW, I cannot reproduce it either.
>>> >
>>> >> If the fix is safe (defensive), IMHO we could get that in as I
>>> >> continue to debug by adding some extra code in the 'if' block.
>>> >
>>> > IMO is best to let it stand, or even add an assertion; the best way to
>>> > catch it is by having it happen.
>> I completely agree with Juanma: your ``defensive'' fix will simply
>> sweep the problem under the carpet, and it won't get fixed for a long
>> time, considering that no one can currently reproduce it except
>> yourself.
>>> Could we just log the required extra information for further debugging
>>> when that happens? Allowing it to crash is a serious inconvenience
>>> (especially  for me since I use the code from HEAD for my regular
>>> work)
>> Then please help us debug and fix this ASAP.  TIA
> I am able to narrow down to the minimum configuration you need in your
> .emacs file to get this crash (following the steps I had mentioned
> earlier).
> I put the following lines in my .emacs, opened xdisp.c file and used
> the arrow button to move down the lines. Once the cursor reached the
> last visible line, the crash happens (before pulling the new lines
> into visible frame).
> This crash does not happen with a different font though (like courier)!
> (setq inhibit-splash-screen t)
> (setq *def-font
>  "-*-Lucida Sans Typewriter-normal-*-*-mono-13-*-*-*-c-*-*-*")
> (if (boundp '*def-font)
>    (add-to-list 'default-frame-alist `(font . ,*def-font)))

The crash does not happen with (increased the font size by 1 point):
(setq inhibit-splash-screen t)
(setq *def-font
  "-*-Lucida Sans Typewriter-normal-*-*-mono-14-*-*-*-c-*-*-*")
(if (boundp '*def-font)
    (add-to-list 'default-frame-alist `(font . ,*def-font)))


Contents reflect my personal views only!

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