Diff for the revision 14556 (and by the way, new quicklisp  2013-06-15):
http://common-lisp.net/project/cl-test-grid/abcl/abcl-diff14.html

As you see, there are some regressions in this revision.
Some of them are caused by the same error "The assertion (EQ (CAR (SECOND JVM::FORM)) (QUOTE LAMBDA)) failed."

Also, there are some crashes (tinaa, metatilities, etc).
Reproduced tinaa crash with
  rm -rf ~/.cache/common-lisp/
  java -jar lisps/abcl/dist/abcl.jar --eval '(ql:quickload :tinaa)' > tinaa.load.log 2>&1
  less tinaa.load.log
reveals "java.lang.Error: ABCL Debug.assertTrue() assertion failed!"