[boost] [regrex] Failure on newly added test regex_regress_threaded on Tru64/GCC

For reference, see http://tinyurl.com/rm4dr and http://tinyurl.com/k53v2. Interestingly enough, the test passes on Tru64/CXX. Compiled with gcc 4.0.3 the test aborts with 'terminate called recursively', compiled with 3.4.4 it throws a SIGABRT. Is there anything I can do to help in debugging? Markus