{"record":{"id":"397b3fe8296938c9","repo":"deepseek-ai/deepseek-harness","slug":"typert-lookup-key-is-already-registered","errorCode":null,"errorMessage":"typert: lookup \"${key}\" is already registered","messagePattern":"typert: lookup \"(.+?)\" is already registered","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/typert/registry/src/service.ts","lineNumber":296,"sourceCode":"    return ctx.effect(function* () {\n      resolvers.set(key, entry)\n      changes.emit({ kind: 'lookup', key })\n      yield () => {\n        /* v8 ignore next -- duplicate configuration is rejected, so this effect remains the key's unique owner. */\n        if (resolvers.get(key) !== entry) return\n        resolvers.delete(key)\n        changes.emit({ kind: 'lookup', key })\n      }\n    }, `typert.lookups.configure(${JSON.stringify(key)})`)\n  }\n\n  private register<Host, Wire>(ctx: Context, key: string, provider: TypertLookupProvider<Host, Wire>): TypertDisposer {\n    validateSegment('lookup key', key)\n    validateSegment('lookup parameter', provider.parameter)\n    validateWireName('lookup wire field', provider.wire)\n    validateNonempty('lookup Host type symbol', provider.hostTypeSymbol)\n    validateNonempty('lookup wire type symbol', provider.wireTypeSymbol)\n    if (this.providers.has(key)) throw new Error(`typert: lookup \"${key}\" is already registered`)\n    const definition: TypertLookupDefinition = {\n      key,\n      parameter: provider.parameter,\n      wire: provider.wire,\n      hostTypeSymbol: provider.hostTypeSymbol,\n      wireTypeSymbol: provider.wireTypeSymbol,\n    }\n    const known = this.definitions.get(key)\n    if (known !== undefined && !lookupDefinitionEquals(known, definition)) {\n      throw new Error(`typert: lookup \"${key}\" changed its wire declaration during this registry lifetime`)\n    }\n    const owner = {}\n    const entry: ProviderEntry<TypertLookupProvider> = { provider, owner }\n    const { definitions, providers, changes } = this\n    return ctx.effect(function* () {\n      definitions.set(key, definition)\n      providers.set(key, entry)\n      changes.emit({ kind: 'lookup', key })","sourceCodeStart":278,"sourceCodeEnd":314,"githubUrl":"https://github.com/deepseek-ai/deepseek-harness/blob/b150a551b8d465e31e418e1b2eaf5e79bbb7d28e/packages/typert/registry/src/service.ts#L278-L314","documentation":"Error \"typert: lookup \"${key}\" is already registered\" thrown in deepseek-ai/deepseek-harness.","triggerScenarios":"Thrown at packages/typert/registry/src/service.ts:296 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Register the lookup once per key; dispose the existing registration before replacing it."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"b150a551b8d465e31e418e1b2eaf5e79bbb7d28e","analyzedAt":"2026-08-24T18:12:29.105Z","schemaVersion":2},"datasetVersion":"2026-08-24T22:17:12.610Z"}