[Sbcl-devel] Re: make-array default initial-element

[Lynn Q. <qu...@ai...>]

Numeric arrays in Allegro v6.0 are still totally uninitialized unless
:INITIAL-ELEMENT or :INITIAL-CONTENTS is specified.  In my previous
message I thought this ACL "feature" was fixed, but I had not tested
it in compiled code, which apparently has some optimizations.  This is
actually a VERY BAD "feature" of ACL.  You are likely to end up with
floating point exceptions, integer overflows, who knows what, and it
will be completely unreproducible.

At least CMUCL initializes arrays in a reproducible fashion.