stack traces on fedora and mingw

[Per Bothner]

Jeff Sturm wrote:

> As a data point, I have FC1, and I don't see mangled stack
> traces using either the system gcj or a recent build, nor the system
> c++filt vs. a recent build.

strace doesn't report c++filt - or any fork or exec*.

I'm trying to trace the code with gdb, though it's awkward.
(I get lotd of 'Variable "this" is not available.' errors
from gdb.)

I've gotten to the fork.

It's possible my FileChannel changes might be wrong, since
I did have to change ConcreteProcess.

More later.
-- 
	--Per Bothner
per@bothner.com   http://per.bothner.com/