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Re: crash in emacs-21.1


From: Andreas Schwab
Subject: Re: crash in emacs-21.1
Date: 24 Oct 2001 16:36:58 +0200
User-agent: Gnus/5.090003 (Oort Gnus v0.03) Emacs/21.1

Eli Zaretskii <address@hidden> writes:

|> On Wed, 24 Oct 2001, Sadinoff, Daniel wrote:
|> 
|> > Just to be clear here, I understand that there's an interoperability 
problem
|> > with xemacs-compiled elc's, but is there the expectation that GNU emacs-21
|> > should be able to cleanly load anything byte-compiled with GNU-emacs-20? 
|> 
|> I'm not really sure what is the official say-so on this (could people who 
|> know the byte compiler better than I do please help?)

IMHO the byte compiler should be upward compatible, and also crash safe.
Unfortunately, the function byte-code only does full checking if
BYTE_CODE_SAFE is defined, such that you can get undefined behaviour
(which may include crashing) if you pass an invalid bytecode string.

Andreas.

-- 
Andreas Schwab                                  "And now for something
address@hidden                          completely different."
SuSE Labs, SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
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