Dear all, after trying around a while this seems to be a good question for Haskell-cafe to me: Is somewhere a place (e.g. some Hackage package) where intercepting exceptions from C++ library code is done, so one can look *how* it is done? Generally, it is the following: 1) Injecting code that throws a an exception in C++ library code, e.g., throw runtime_error("OOOPS..."); 2) then, I tried out everything in reach (Haskell docs, Hackage interfaces to C++ considered to be well-done) to get it caught (try, catch, bracket, finally; various exception types; forkOS). 3) To my surprise, every time the output stays the same: terminate called after throwing an instance of 'std::runtime_error' what(): OOOPS... Is it possible at all to get a grip of this? Is there some place where it is done? Does the terminate call already happen with the C++ execution? Any comment welcome, cheers, Nick