{"ast_node_type":"variable","tokens":[{"end":50,"kind":"keyword","start":0,"text":"let"}]}
        let first = bx.load(first_ty, ptr, align);
        let second_ty = bx.reg_backend_type(&cast.rest.unit);
        let second_ptr = bx.inbounds_ptradd(ptr, bx.const_usize(offset_from_start.bytes()));