denoland/deno · error · TypeError

Selector can not specify both 'start' and 'end' key when spe

Error message

Selector can not specify both 'start' and 'end' key when specifying 'prefix'

What it means

Error "Selector can not specify both 'start' and 'end' key when specifying 'prefix'" thrown in denoland/deno.

Source

Thrown at ext/kv/01_db.ts:873

      ) => Promise<Deno.KvEntry<unknown>[]>;
    },
  ) {
    super();
    let prefix: Deno.KvKey | undefined;
    let start: Deno.KvKey | undefined;
    let end: Deno.KvKey | undefined;
    if (ObjectHasOwn(selector, "prefix") && selector.prefix !== undefined) {
      prefix = ObjectFreeze(ArrayPrototypeSlice(selector.prefix));
    }
    if (ObjectHasOwn(selector, "start") && selector.start !== undefined) {
      start = ObjectFreeze(ArrayPrototypeSlice(selector.start));
    }
    if (ObjectHasOwn(selector, "end") && selector.end !== undefined) {
      end = ObjectFreeze(ArrayPrototypeSlice(selector.end));
    }
    if (prefix) {
      if (start && end) {
        throw new TypeError(
          "Selector can not specify both 'start' and 'end' key when specifying 'prefix'",
        );
      }
      if (start) {
        this.#selector = { prefix, start };
      } else if (end) {
        this.#selector = { prefix, end };
      } else {
        this.#selector = { prefix };
      }
    } else {
      if (start && end) {
        this.#selector = { start, end };
      } else {
        throw new TypeError(
          "Selector must specify either 'prefix' or both 'start' and 'end' key",
        );
      }

View on GitHub (pinned to 89f33cbef2)

When it happens

Trigger: Thrown at ext/kv/01_db.ts:873 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/72d5e0982848458a. Report an issue: GitHub.