Reproducible, simple bug; g++ toolchain / std::string bug?

[Steven Brown]

I've run into what appears to be a bug in the g++ toolchain or the STL's 
std::string using the latest Cygwin dist (up to date as of right now). 
Minimal test case attached.

If my shared library does a callback to a function returning 
std::string, and only if the std::string is empty, I get an abort when 
that std::string is destroyed.

The attached files will show this bug - run make and the xxx-cygwin.exe 
that's produced and it will abort.  The same will happen if you use 
libtool to build it the right way - the autoconf/ dir in the bug's 
repository[1] can be used for that if you want to see it (copy it into 
the main dir, ./autogen.sh && make).

Any ideas as to where the problem lies or how to further identify it?


[1] https://svn.variadic.org/public/trunk/weirdbug/
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