Comment 3 for bug 1351477

Looking at your stack trace, none of the stacks include your Query constructor. So, it doesn't look like the scope is hanging, rather, it looks like an exception was thrown by md.location() (which is what happens if no location data was sent by the client).

Can you put an exception handler for std::exception around the call and print the value of e.what() please?

I'll have a look at the code. At the very least, if this happens, we should leave a footprint of it behind.