segmentation fault when window closes

I have a gtkmm application that crashes with a segmentation fault when
I close the main window.

It makes use of a class called "Object", that has a member called
"name", of type ustring. If I comment out that member the program does
not crash, so the crash is somehow related to ustring.

Then I have a vector of Objects. If I comment out the push_back's the
program does not crash. This means that the crash happens when the
vector dtor does its business on the ustring's. To confirm this I
explicitly called the clear method of the vector before the end of the
main function, and then the crash happens there instead of at the end
of the program.

I created a example program to summarize the relevant details of my
application. It is listed below. Interestingly the example does _not_
crash. But I must be doing something wrong, and the fact that the
example does not crash must be a coincidence. I wonder if anybody can
spot what is wrong?


#include <iostream>
#include <vector>

#include <glibmm/ustring.h>

using Glib::ustring;

class Object
	Object(int id, char * name) : id(id), name(name) {};

	int id;
	ustring name;

int main(int argc, char** argv)
	std::vector <Object> objects;

	for (int i = 0; i < 100; i++)
			Object o(i, (char *) "hello");


	objects.clear(); // there is a segmentation fault here in the "real"

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