Problem installing facets into locales explicitly

[David List]

I seem to have a problem installing facets into locales explicitly. It
is not clear to me whether the problem is my compiler, my environment
or my code.

I am trying out some code from Langer/Kreft's iostream book. Here is
an example:

----------main.cpp----------
#include <string>
#include <locale>
#include <iterator>
using namespace std;

int main()
{
locale loc(locale("German"), new num_put<char,
back_insert_iterator<string> >);
}
----------main.cpp----------

This one sentence alone compiles, but gives me a segmentation fault
when run. The code is from the Langer/Kreft book page 308 (only the
first sentence in the example).

What could cause this problem?

--
Med venlig hilsen / Best regards
David List