understanding GC

[Michael Sperber]

Julian Bradfield <jcb+xeb at jcbradfield.org> writes:

> As usual when I try to do anything, I find I really don't quite
> understand GC and when GCPRO is necessary.

Did you look at the section on garbage collection in the internals
manual?  In particular, there's a subsection on GCPRO.

> concat() in fns.c GCPROs its arguments, to be helpful to the caller.
> What is it that concat() does that could cause a GC or QUIT?

It allocates.  If there's not enough free space in the heap to satisfy
an allocation, a GC is triggered.

-- 
Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla