{"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"Some(alloc_id)"}]}
                Some(alloc_id) => {
            Place::Ptr(mplace) => match mplace.ptr.provenance.and_then(Provenance::get_alloc_id) {
                    write!(fmt, "by ref {:?}: {:?}", mplace.ptr, self.ecx.dump_alloc(alloc_id))