[boost] [regex, threads, test] Exception problems

In another posting, John Maddock wrote:

... I'm a little concerned about some of the regex library tests which haven't changed in ages, but are none the less failing due to exceptions thrown from Boost.Thread and Boost.Test. I'm not sure that this is necessarily these libraries fault, but we really ought to try and get to the cause of this...

I'm worried about these too. I'm also getting exception related dialog boxes during Windows smoke tests; they don't even say what program they are coming out of. Not sure if that is the same problem; I'll try to isolate one of them and report details. Which specific test are you concerned about? regex_regress_threaded? Any others? --Beman