message: Disable assertion on this pointer
  Summary: Prevent -1 index
diff: @@ -255,8 +255,8 @@ RemoveNullcheckStringArg::Stats RemoveNullcheckStringArg::change_in_cfg(
  Stats stats{};
  cfg::CFGMutation m(cfg);
  auto params = cfg.get_param_instructions();
  - std::unordered_map<size_t, uint32_t> param_index;
  - uint32_t arg_index = is_virtual ? -1 : 0;
  + std::unordered_map<size_t, int> param_index;
  + int arg_index = is_virtual ? -1 : 0;
  reaching_defs::MoveAwareFixpointIterator reaching_defs_iter(cfg);
  reaching_defs_iter.run({});
  @@ -322,6 +322,10 @@ RemoveNullcheckStringArg::Stats RemoveNullcheckStringArg::change_in_cfg(
  }
  auto index = param_iter->second;
  + // If for any reason we have assertion on this pointer
  + if (index == -1) {
  + continue;
  + }
  auto tmp_reg = cfg.allocate_temp();
  IRInstruction* cst_insn = new IRInstruction(OPCODE_CONST);
  cst_insn->set_literal(index)->set_dest(tmp_reg);
  