{"ast_node_type":"variable","tokens":[{"end":39,"kind":"keyword","start":0,"text":"let"}]}
        let unit = self.tcx.types.unit;
    pub(crate) fn check_block_no_value(&self, blk: &'tcx hir::Block<'tcx>) {
        let ty = self.check_expr_block(blk, ExpectHasType(unit));