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Simultaneous generational GC and error-check immutables?
- To: CLISP List <email@example.com>
- Subject: Simultaneous generational GC and error-check immutables?
- From: "M. Thomas" <firstname.lastname@example.org>
- Date: Tue, 6 Dec 1994 14:39:46 -0500 (EST)
I recently compiled CLISP from the latest source (in source-haible
directory), under Linux 1.1.54, following the instructions to enable
better error-checking of immutables. (I assume I automatically got
But the following sequence of forms gives no error message (return values
> (defvar temp-string "Matson")
> (setf (char temp-string 0) #\W)
and now temp-string evals to "Watson".
A recent poster to this list inquired why evaluating the (setf ...)
produced an error -- my CLISP does _not_ produce the error, hence my
There seem to be three likely reasons for this behavior:
(1) I did something wrong in trying to enable immutable error-checking;
(2) I misunderstand what error-checking of immutables really means;
(3) Error-checking of immutables and generational GC can't be had at
the same time. (This is suggested by the existence of two Linux
binaries in the binaries/linux directory ... Hmmmm ...)
Thanks for the enlightenment!
Mark A. Thomas