{"record":{"id":"fbba6efb26b502df","repo":"lutzroeder/netron","slug":"expected-offset-more-bytes-the-file-might-be-c","errorCode":null,"errorMessage":"Expected ${offset} more bytes. The file might be corrupted. Unexpected end of file.","messagePattern":"Expected (.+?) more bytes\\. The file might be corrupted\\. Unexpected end of file\\.","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"source/node.js","lineNumber":75,"sourceCode":"    }\n\n    read(length) {\n        length = length === undefined ? this._length - this._position : length;\n        if (length < 0x10000000) {\n            const position = this._fill(length);\n            return this._buffer.slice(position, position + length);\n        }\n        const position = this._position;\n        this.skip(length);\n        const buffer = new Uint8Array(length);\n        this._read(buffer, position);\n        return buffer;\n    }\n\n    _fill(length) {\n        if (this._position + length > this._length) {\n            const offset = this._position + length - this._length;\n            throw new Error(`Expected ${offset} more bytes. The file might be corrupted. Unexpected end of file.`);\n        }\n        if (!this._buffer || this._position < this._offset || this._position + length > this._offset + this._buffer.length) {\n            this._offset = this._position;\n            const length = Math.min(0x10000000, this._length - this._offset);\n            if (!this._buffer || length !== this._buffer.length) {\n                this._buffer = new Uint8Array(length);\n            }\n            this._read(this._buffer, this._offset);\n        }\n        const position = this._position;\n        this._position += length;\n        return position - this._offset;\n    }\n\n    _read(buffer, offset) {\n        const descriptor = fs.openSync(this._file, 'r');\n        const stat = fs.statSync(this._file);\n        if (stat.mtimeMs !== this._mtime) {","sourceCodeStart":57,"sourceCodeEnd":93,"githubUrl":"https://github.com/lutzroeder/netron/blob/d8a543f5f847ef596aa58858d6adcf5d75545f7f/source/node.js#L57-L93","documentation":"Thrown by the file-backed stream's _fill() when fulfilling a read of 'length' bytes from the current position would require more bytes than the file contains. _fill is the backing routine for read/peek, so this error surfaces whenever a parser asks for more data than the (possibly truncated) file can supply.","triggerScenarios":"Calling stream.read(n) or stream.peek(n) with n greater than _length - _position; typical when a fixed-size header/struct read runs off the end of a truncated model file.","commonSituations":"Corrupted or partially downloaded model files, mismatched format assumptions (reading a fixed 8-byte field where fewer remain), or seeking near the end then requesting a large peek buffer.","solutions":["Verify file integrity and size against the expected artifact.","Check the read length passed in — it may be derived from an uninitialized or misparsed size variable.","Before reading, guard with stream.position + n <= stream.length."],"exampleFix":"// before\nconst bytes = stream.read(16);\n\n// after\nconst remaining = stream.length - stream.position;\nif (remaining < 16) throw new Error(`Need 16 bytes, only ${remaining} left`);\nconst bytes = stream.read(16);","handlingStrategy":"validation","validationCode":"const remaining = stream.length - stream.position;\nif (n > remaining) {\n    throw new Error(`Read of ${n} bytes exceeds ${remaining} remaining bytes`);\n}","typeGuard":null,"tryCatchPattern":"try { const b = stream.read(n); } catch (e) { if (/more bytes/.test(e.message)) throw new Error('Unexpected EOF while reading model section'); throw e; }","preventionTips":["Always compare requested read size against remaining bytes.","Treat any EOF during header parsing as a corrupt file immediately.","Keep file-size sanity checks at the container level before deep parsing."],"tags":["stream","fill","read","truncated-file","bounds-check"],"backgroundTag":"unexpected-end-of-file","analyzedSha":"d8a543f5f847ef596aa58858d6adcf5d75545f7f","analyzedAt":"2026-08-27T19:21:42.082Z","schemaVersion":2},"datasetVersion":"2026-08-28T00:17:15.603Z"}