{"record":{"id":"2bd49858dd227d07","repo":"oven-sh/bun","slug":"cannot-derive-optional-on-a-required-type","errorCode":null,"errorMessage":"Cannot derive optional on a required type","messagePattern":"Cannot derive optional on a required type","errorType":"validation","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"src/codegen/bindgen-lib-internal.ts","lineNumber":528,"sourceCode":"          .filter(k => this.flags[k])\n          .map(x => \", \" + x)\n          .join(\"\")}]`,\n        \"regexp\",\n      )}` +\n      (this.data\n        ? \" \" +\n          inspect(this.data, {\n            ...options,\n            depth: options.depth === null ? null : options.depth - 1,\n          }).replace(/\\n/g, \"\\n\")\n        : \"\")\n    );\n  }\n\n  // Public interface definition API\n  get optional() {\n    if (this.flags.required) {\n      throw new Error(\"Cannot derive optional on a required type\");\n    }\n    if (this.flags.default) {\n      throw new Error(\"Cannot derive optional on a something with a default value (default implies optional)\");\n    }\n    return new TypeImpl(this.kind, this.data, {\n      ...this.flags,\n      optional: true,\n    });\n  }\n\n  get finite() {\n    if (this.kind !== \"f64\") {\n      throw new Error(\"finite can only be used on f64\");\n    }\n    if (this.flags.finite) {\n      throw new Error(\"This type already has finite set\");\n    }\n    return new TypeImpl(this.kind, this.data, {","sourceCodeStart":510,"sourceCodeEnd":546,"githubUrl":"https://github.com/oven-sh/bun/blob/8c5296ac459e8252d3cd702f3fbcbb0c249d95d5/src/codegen/bindgen-lib-internal.ts#L510-L546","documentation":"Error \"Cannot derive optional on a required type\" thrown in oven-sh/bun.","triggerScenarios":"Thrown at src/codegen/bindgen-lib-internal.ts:528 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"8c5296ac459e8252d3cd702f3fbcbb0c249d95d5","analyzedAt":"2026-08-16T08:01:58.794Z","schemaVersion":2},"datasetVersion":"2026-08-16T08:17:34.114Z"}