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Re: Emacs 22.0.50.1 crash on make_uninit_multibyte_string


From: Daniel Barrett
Subject: Re: Emacs 22.0.50.1 crash on make_uninit_multibyte_string
Date: Sat, 22 Apr 2006 09:46:44 -0400

In case anybody is interested, the "random crash" problem between Emacs and
Kyle Jones's VM package completely disappeared when I upgraded from SUSE
Linux 9.1 to 10.0.  It's now been a month without a single segfault.  Same
versions of Emacs and VM as before.

--
Dan Barrett
address@hidden



On September 16, 2005, Kim F. Storm wrote:
>I took a quick look at VM, and found this:
>
>> ;;(provide 'vm-byteopts)
>>  
>> ;; get the compiler loaded so we can undo some of the things that
>> ;; happen when it's loaded.
>> (load "bytecomp" t t nil)
>> ;; Emacs 19 byte compiler complains about too much stuff by default.
>> ;; Turn off most of the warnings here.
>> (setq byte-compile-warnings '(free-vars))
>> ;; need to use these variables for v18 support.
>> ;; stifle the compiler.
>> (put 'inhibit-local-variables 'byte-obsolete-variable nil)
>> ;; Turn off dynamic docstrings and lazy function loading.  This
>> ;; is a new feature of FSF Emacs 19.29, and is incompatible
>> ;; with pre-19.29 versions of FSF Emacs and all version of Lucid
>> ;; Emacs / XEmacs.  I like being able to share .elc files between
>> ;; different v19 Emacses.
>> (setq byte-compile-dynamic nil)
>> (setq byte-compile-dynamic-docstrings nil)
>> ;; avoid v20 features because users are going
>> ;; to try to share elc files no matter what we tell them.
>> (setq byte-compile-emacs19-compatibility t)
>>  
>> (provide 'vm-byteopts)
>
>
>I wonder if some of these settings may trigger some unusual
>byte-code pattern which we don't normally see in emacs 22.x ???
>
>
>Daniel Barrett <address@hidden> writes:
>
>> On September 8, 2005, Kim F. Storm wrote:
>>>Daniel Barrett <address@hidden> writes:
>>>> On September 8, 2005, Kim F. Storm wrote:
>>>>>Can you provide an "xbacktrace" and "bt full" backtrace.
>>
>> (gdb) xbacktrace
>> "vm-left-justify-string"
>> "vm-reencode-mime-encoded-words-in-string"
>> "format"
>> "list"
>> "eval"
>> "vm-summary-sprintf"
>> "vm-su-summary"
>> "vm-stuff-attributes"
>> "vm-stuff-virtual-attributes"
>> "vm-set-xxxx-flag"
>> "vm-set-new-flag"
>> "vm-show-current-message"
>> "vm-scroll-forward"
>> "call-interactively"
>>
>> (gdb) bt full
>> #0  make_uninit_multibyte_string (nchars=85, nbytes=85) at alloc.c:1880
>>         string = Variable "string" is not available.
>>
>>>Please use M-x report-emacs-bug to include proper information
>>>about your emacs version and environment, including additional
>>>information about the crash (as instructed).
>>
>> In GNU Emacs 22.0.50.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
>>  of 2005-07-19 on spinky
>> X server distributor `The XFree86 Project, Inc', version 11.0.40399902
>> configured using `configure '--prefix' '/usr/local/emacs-dev''
>>
>> Important settings:
>>   value of $LC_ALL: nil
>>   value of $LC_COLLATE: C
>>   value of $LC_CTYPE: nil
>>   value of $LC_MESSAGES: nil
>>   value of $LC_MONETARY: nil
>>   value of $LC_NUMERIC: nil
>>   value of $LC_TIME: nil
>>   value of $LANG: en_US.UTF-8
>>   locale-coding-system: utf-8
>>   default-enable-multibyte-characters: nil
>>
>> Major mode: VM Summary
>>
>> Minor modes in effect:
>>   mouse-wheel-mode: t
>>   tooltip-mode: t
>>   auto-compression-mode: t
>>   global-font-lock-mode: t
>>   blink-cursor-mode: t
>>   unify-8859-on-encoding-mode: t
>>   utf-translate-cjk-mode: t
>>   line-number-mode: t
>>   next-error-follow-minor-mode:  Fol
>>
>> Recent input:
>> [irrelevant -- run much later than the bug occurrence]
>>
>> Recent messages:
>> Reordering messages... done
>> 48 messages, 0 new, 0 unread, 0 deleted
>> Generating summary... 40
>> Generating summary markers... 
>> Generating summary... done
>> 48 messages, 0 new, 0 unread, 0 deleted
>> Checking for new mail for /home/dbarrett/.Mail/emacs...
>> 48 messages, 0 new, 0 unread, 0 deleted
>> Mark set
>> Loading emacsbug...done
>>
>>
>
>-- 
>Kim F. Storm <address@hidden> http://www.cua.dk




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