denoland/deno · error · TypeError

Invalid mutation '${type}' without value

Error message

Invalid mutation '${type}' without value

What it means

Error "Invalid mutation '${type}' without value" thrown in denoland/deno.

Source

Thrown at ext/kv/01_db.ts:499

      switch (mutation.type) {
        case "delete":
          type = "delete";
          if (mutation.value) {
            throw new TypeError("Invalid mutation 'delete' with value");
          }
          break;
        case "set":
          if (typeof mutation.expireIn === "number") {
            expireIn = mutation.expireIn;
          }
          validateExpireIn(expireIn);
          /* falls through */
        case "sum":
        case "min":
        case "max":
          type = mutation.type;
          if (!ObjectHasOwn(mutation, "value")) {
            throw new TypeError(`Invalid mutation '${type}' without value`);
          }
          value = serializeValue(mutation.value);
          break;
        default:
          throw new TypeError("Invalid mutation type");
      }
      ArrayPrototypePush(this.#mutations, [key, type, value, expireIn]);
    }
    return this;
  }

  sum(key: Deno.KvKey, n: bigint): this {
    ArrayPrototypePush(this.#mutations, [
      key,
      "sum",
      serializeValue(new KvU64(n)),
      undefined,
    ]);

View on GitHub (pinned to 89f33cbef2)

When it happens

Trigger: Thrown at ext/kv/01_db.ts:499 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of denoland/deno@89f33cbef2 (2026-08-16). Data as JSON: /api/errors/c2503b5b8d380598. Report an issue: GitHub.