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- To: email@example.com
- Subject: Record Problem
- From: paul@informatics.WUstl.EDU (Terrance Paul McCartney)
- Date: Thu, 22 Jul 93 14:10:28 CDT
I have code that uses "rect" type records frequently. That is, I create them
using "make-record" and destroy them using "dispose-record". I am not using
them just temporarily within a single function, so "rlet" is not an alternative.
My problem is that sometimes when I call "dispose-record", I get the error:
"Can't operate on free block." As a possible solution to this, I tried:
(with-dereferenced-handles ((r rect)) ;; "rect" is a record of type :rect
(dispose-rect r :rect))
This reduces the number of times that I get the error, but I still get it
sometimes (rarely). Also, dispose-rect seems to be unstable if the optional
":rect" record type specifier is not supplied (i.e. it can crash my machine).
Does anyone know a possible reason for this?