SEH64 can't handle exceptions crossing callback boundaries?

_From [derek.br...@gmail.com](https://code.google.com/u/117968039472581148324/) on March 01, 2010 10:55:54_

in trunk/suite/tests/win32/callback.c we catch an exception in a callback
using a try/except in the msg loop in that thread -- yet natively the
exception is not making it across the callback boundary! Is that a
fundamental limitation of the overly-structured SEH64? 32-bit SEH has no
problem. For now I'm putting in a local try/except.

_Original issue: http://code.google.com/p/dynamorio/issues/detail?id=266_