what gcc version are you using? gcc 3.2 if prefered.
sort of looks like a flext problem. can you load other externals with flext?
Yes, it's a problem inside flext, but it's hard to believe that the respective lines of code can segfault. It would be interesting to know if other users of readanysf~ or other threaded flext externals have a similar problem. As i haven't had such problems it's probably a memory-corrupting bug somewhere else in the external. I'll have a look at it as soon as i have the time to.
best greetings, Thomas