Segfault while testing lil

This causes a SEGMENTATION-VIOLATION at semi-random places during the testing:

rlwrap ecl -eval "'(#.(require \"asdf\")#.(asdf:test-system :lil))"

lil does nothing low-level, and Daniel K. suspects the culprit might be hu.dwim.stefil.

Note that lil has lots of dependencies, so if you don't have them all and can't bother to install them, you may replace the (require \"asdf\") with the loading of quicklisp.

(asdf:test-system :lil)

Running with fairly recent versions of lisp-interface-library (2016-04-13), hu.dwim.stefil (2016-01-11), ecl (2016-03-26) from master branches on Ubuntu 16.04 GNU/Linux amd64.