Memory allocators / STL

[Jason Merrill]

There have been problems with using the pool allocators in a multithreaded
program; I've pointed you at an internal bug report (102997) about that a
couple of times.  I would think the test case from there should work for
you.  I was able to reproduce the bug on schitzo.

Of course, that bug report is against a 2.95ish toolchain, so the problems
may have been fixed by now.

Jason