RE: crash in emacs-21.1

[Sadinoff, Daniel]

but we don't enable BYTE_CODE_SAFE by default?

anyway, here's the code in question.  Note that it's quite old, circa 1998.

http://www.sadinoff.com/tmp/bad-cc.tar.gz

-----Original Message-----
From: Andreas Schwab [mailto:schwab@suse.de]
Sent: Wednesday, October 24, 2001 10:37 AM
To: Eli Zaretskii
Cc: Sadinoff, Daniel; Pavel Janík; bug-gnu-emacs@gnu.org
Subject: Re: crash in emacs-21.1


Eli Zaretskii <eliz@is.elta.co.il> 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.

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