Memory leak in ios.cc:326

[Benjamin Kosnik]

>I have my hands full at the moment, but I wanted to ACK this message.

Me too. I'm going to take a break from the 27_io testsuite and scope
this a bit today.

There's one test case for callbacks, I'm using that. Looking at this on
3.2, with GLIBCPP_FORCE_NEW, everything looks ok. But on 3.4, I'm seeing
some issues with constructing the locale cache for the standard streams.
I suspect this is also the issue for 3.3.

Anyway. 

Carlo is right, debugging is a mess right now for mainline. I can core
gdb very quickly on a variety of hardware and linux distros (stepping
into std::ios construction, for one).  It looks like gdb-5.2 works much
better than either mainline gdb, other gdb branches, or the last gdb
release.

best,
benjamin