try:
rv = url_adapter.build(endpoint, values, method=method,
force_external=external)
except BuildError, error:
# We need to inject the values again so that the app callback can
# deal with that sort of stuff.
values['_external'] = external
values['_anchor'] = anchor
values['_method'] = method
return appctx.app.handle_url_build_error(error, endpoint, values)
rv = url_adapter.build(endpoint, values, method=method,
force_external=external)
If no exception was raised for url_adapter.build(...) then the same method call
would be made after the try...except block. This is unnecessary.