Windows: Throwing Exceptions from Fibers in D2.059: Access Violation

[Andrew Lauritzen]

> The x32 Windows code should be pretty well tested.  If this is 
> using the x64 code though, that's all quite new.  I'll give 
> this a try when I find some time, but can't suggest a 
> workaround offhand.  It almost sounds alignment-related, which 
> could be tricky.

This is using the x86 (32-bit) code, so I'm not sure what could 
be going wrong. Is it well-tested on Windows too? Seems like 
something about the interaction between the fiber context/stack 
and SEH is not happy.