Does not build with SBCL 2.0.9 - :initform/:type slot option problem

[quicklisp]

The latest SBCL checks (to some degree) that the object in :initform matches the :type option. This causes some build failures in CLML. Logs are here:

http://report.quicklisp.org/2020-09-29/failure-report/clml.html

[quicklisp]

This remains a problem in the latest SBCL.