{"ast_node_type":"variable","tokens":[{"end":53,"kind":"keyword","start":0,"text":"let"}]}
        let block = self.term_patch_map.next_index();
    pub(crate) fn new_block(&mut self, data: BasicBlockData<'tcx>) -> BasicBlock {
        debug!("MirPatch: new_block: {:?}: {:?}", block, data);