Looking at the make file, I see:
# test upgrade is a very long run... This does just the regression tests test-all-no-upgrade: @for lisp in ${lisps} ; do \ ${MAKE} test-lisp test-clean-load l=$$lisp || exit 1 ; \ done
I think that what's happening is that I'm actually getting a hang in test-clean-load on abcl. Testing test-clean-load separately on ABCL exhibits the hang:
$ make test-clean-load l=abcl ./test/run-tests.sh -c abcl <nothing>
as does:
./run-tests.sh -c abcl <nothing>
I don't really know what test-clean-load is supposed to do, so I can't comment further.
best, r