{"record":{"id":"c2988f579585e819","repo":"oven-sh/bun","slug":"duplicate-private-name-name-in-bunbuiltinname","errorCode":null,"errorMessage":"Duplicate private name \"${name}\" in BunBuiltinNames.h","messagePattern":"Duplicate private name \"(.+?)\" in BunBuiltinNames\\.h","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"src/codegen/bundle-functions.ts","lineNumber":808,"sourceCode":"      \"#define BUN_COMMON_PRIVATE_IDENTIFIERS_EACH_PROPERTY_NAME\",\n    );\n    let definedBuiltinNamesMacroEndI = BunBuiltinNamesHeader.indexOf(\n      \"--- END of BUN_COMMON_PRIVATE_IDENTIFIERS_EACH_PROPERTY_NAME ---\",\n    );\n    const definedBuiltinNames = BunBuiltinNamesHeader.slice(definedBuiltinNamesStartI, definedBuiltinNamesMacroEndI)\n      .split(\"\\n\")\n      .map(x => x.trim())\n      .filter(x => x.startsWith(\"macro(\"))\n      .map(x => x.slice(x.indexOf(\"(\") + 1, x.indexOf(\")\")))\n      .map(x => x.trim())\n      .sort();\n\n    const uniqueDefinedBuiltinNames = new Set();\n    for (let name of definedBuiltinNames) {\n      const prevSize = uniqueDefinedBuiltinNames.size;\n      uniqueDefinedBuiltinNames.add(name);\n      if (uniqueDefinedBuiltinNames.size === prevSize) {\n        throw new Error(`Duplicate private name \"${name}\" in BunBuiltinNames.h`);\n      }\n    }\n    for (let additionalPrivateName of additionalPrivateNames) {\n      if (uniqueDefinedBuiltinNames.has(additionalPrivateName)) {\n        additionalPrivateNames.delete(additionalPrivateName);\n      }\n    }\n\n    let additionalPrivateNamesHeader = `// Generated by ${import.meta.path}\n#pragma once\n\n#ifndef BUN_ADDITIONAL_BUILTIN_NAMES\n#define BUN_ADDITIONAL_BUILTIN_NAMES(macro) \\\\\n  ${Array.from(additionalPrivateNames)\n    .map(x => `macro(${x})`)\n    .join(\" \\\\\\n  \")}\n#endif\n`;","sourceCodeStart":790,"sourceCodeEnd":826,"githubUrl":"https://github.com/oven-sh/bun/blob/8c5296ac459e8252d3cd702f3fbcbb0c249d95d5/src/codegen/bundle-functions.ts#L790-L826","documentation":"Error \"Duplicate private name \"${name}\" in BunBuiltinNames.h\" thrown in oven-sh/bun.","triggerScenarios":"Thrown at src/codegen/bundle-functions.ts:808 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"}