With [r12092][1] we apparently need to change the private to protected as in the attached patch.
abcl.compile.java: Compiling 270 source files to /Users/evenson/work/abcl/build/classes /Users/evenson/work/abcl/src/org/armedbear/lisp/Interpreter.java:530:
JAVA_EXCEPTION_CAUSE has private access in org.armedbear.lisp.JavaException .JAVA_EXCEPTION_CAUSE.execute(condition).javaInstance());
[1]: http://trac.common-lisp.net/armedbear/changeset/13092