capybara/virtualenv/lib/python2.7/site-packages/flask/app.py
def handle_url_build_error(self, error, endpoint, values):
        """Handle :class:`~werkzeug.routing.BuildError` on :meth:`url_for`.
        """
        exc_type, exc_value, tb = sys.exc_info()
        for handler in self.url_build_error_handlers:
            try:
                rv = handler(error, endpoint, values)
                if rv is not None:
                    return rv
            except BuildError as error:
                pass

        # At this point we want to reraise the exception.  If the error is
        # still the same one we can reraise it with the original traceback,
        # otherwise we raise it from here.
        if error is exc_value:
            reraise(exc_type, exc_value, tb)
        raise error
def handle_url_build_error(self, error, endpoint, values):
        """Handle :class:`~werkzeug.routing.BuildError` on :meth:`url_for`.
        """
        exc_type, exc_value, tb = sys.exc_info()
        for handler in self.url_build_error_handlers:
            try:
                rv = handler(error, endpoint, values)
                if rv is not None:
                    return rv
            except BuildError as error:
                pass

        # At this point we want to reraise the exception.  If the error is
        # still the same one we can reraise it with the original traceback,
        # otherwise we raise it from here.
        if error is exc_value:
            reraise(exc_type, exc_value, tb)
        raise error
Handle :class:`~werkzeug.routing.BuildError` on :meth:`url_for`.