[Openmcl-devel] tail calls in 1.3 IDE?
bhayes at amsci.org
Thu Aug 13 13:35:00 PDT 2009
As far as I can tell, tail-call optimization has stopped working in
1.3 versions of CCL when running under the IDE. Are others seeing this
same change in behavior? Was the change deliberate? Is there some
setting that controls it?
(defun tail-test (n)
(if (zerop n)
(tail-test (1- n))))
This succeeds under CCL 1.2 in the IDE (I've tested PPC and x8664
versions). It also succeeds in 1.3 when running in the terminal. But
it fails with a stack overflow in 1.3 under the IDE. The backtrace
shows some 60,000 stack frames. (I've tested fresh downloads of the
prepackaged .dmg for PPC and x8664 as well as a newly svn-updated 1.3-
r12575M (DarwinX8664). )
It looks as if a tracing or debugging facility may have been turned on
by default in the IDE. If so, can someone show me the magic switch
that turns it off?
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