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Re: bootstrap problem with union Lisp_Object

From: Stefan Monnier
Subject: Re: bootstrap problem with union Lisp_Object
Date: Tue, 06 Dec 2005 10:44:20 -0500
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux)

>>> I'm still trying to track this down, but just for the record: If I
>>> build recent sources with CC='gcc -DENABLE_CHECKING - 
>>> DUSE_LISP_UNION_TYPE', bootstrapping fails:
>> Fixed...  With these options enabled, EQ evaluates its arguments  
>> twice.

> I think that should be fixed.  The requirement that arguments of EQ or
> NILP need to be side effect free is too easy to forget, since it is
> nowhere documented.

The argument of *any* macro should be free of side effects.


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