I found that attempts to find source would crash with a
bad regexp error. I tracked this down to what I
believe to be an ill-formed regexp in
lisp-locate-clisp. The regexp (really regexp template)
bound to the lexical variable CLASS in that function
had a ?+ sequence, that at least my emacs (xemacs
2.1.14) didn't like. Here's a patched function that at
least seems to work. Since I don't know exactly what
the ?+ was intended to do, I'm not sure I've captured
the right regexp behavior.
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