Unhandled exception?

[Phillip Susi <psusi ubuntu com>]

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I'm trying to track down a bug that prints this:

(gpartedbin:15278): glibmm-CRITICAL **: unhandled exception (type
Glib::Error) in signal handler: domain: g_convert_error code  : 1
what  : Invalid byte sequence in conversion input

I'm trying to understand this glibmm exception stuff and so far it
sounds to me like there is a C++ wrapper around a glib string
conversion function *somewhere* that gets back a Glib::Error return,
and throws that as a C++ exception, which is uncaught, and the default
handler catches it and queues a callback that is later run from the
main loop and prints this message.  The problem is that by the time
the message is printed, the original cause has been removed from the
stack.  Looking at the glibmm sources, I can't even figure out what
function is responsible for queuing the call to
Glib::exception_handlers_invoke().

So how can I find the source of this error?
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