Re: Precise GC

[Chris.Bitmead@misys.com.au]

>This is basically what Emacs does.  I found that we frequently forgot
>to do the equivalent of s_defGc when it was necessary.  In your
>example, it's easy to see that rtn->length is protected, since rtn is
protected, >but when the function is doing something more complicated
(walking and editing a >tree), it got harder.
>
>Don't get me wrong --- it feels nice and simple to me, too.  But it is
>a fact that I made a lot of mistakes.  Stallman did too.

Fair enough. At least I feel gratified that I designed something the same
way as Stallman did :-)