{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"self.stack_mut().last_mut().expect(\"no"}]}
        self.stack_mut().last_mut().expect("no call frames exist")
    pub fn frame_mut(&mut self) -> &mut Frame<'tcx, M::Provenance, M::FrameExtra> {
    }