hang when printing exception

[Tom Tromey]

>>>>> "Tom" == Tom Tromey <tromey@redhat.com> writes:

Tom> That's interesting information.  We had a change here recently:
Tom> Andrew's gjavah.c patch.  That's a suspect right now (but so is every
Tom> change).

Backing out this change removes the problem.  So this is definitely
it.  I'm going to write a small test showing the bug.

We can't just revert Andrew's change, since we need it for 64-bit
platforms.  We need to find a forward-looking fix.

Tom