We have certainly seen problems on production code because of the inability of sending exceptions cross-DLLs. If this problem was fixed, it was not fixed in the current release.
I believe this bug was fixed in an upstream: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34684, so let me change the flag as:CLOSED/ERRATA , feel free to reopen this bug if u still experiencing this problem.