Comment 1 for bug 1909659

Oops - this is not a regression, this is an old bug! (Thanks, Krystof.) Reproduced on SBCL 1.4.16 and 2.0.11.

I only did not notice it because I always run SBCL with (OPTIMIZE SAFETY DEBUG), and it took another person who ran the test suite on default settings to notice this failure.