{"record":{"id":"abed27562922efc0","repo":"huggingface/open-r1","slug":"compilation-error-exit-code-compile-result-exit-c","errorCode":null,"errorMessage":"Compilation error exit code {compile_result.exit_code}\n{compile_result.stderr}","messagePattern":"Compilation error exit code (.+?)\n(.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"src/open_r1/utils/competitive_programming/morph_client.py","lineNumber":182,"sourceCode":"        return True\n\n    async def _compile_code(self, instance: Instance) -> InstanceExecResponse:\n        \"\"\"\n        Compile the code on the instance.\n\n        Args:\n            instance: The MorphCloud instance\n\n        Returns:\n            InstanceExecResponse: Result of compilation\n\n        Raises:\n            RuntimeError: If compilation fails\n        \"\"\"\n        compile_result = await instance.aexec(\"cd /workspace && ./compile\")\n\n        if compile_result.exit_code != 0:\n            raise RuntimeError(f\"Compilation error exit code {compile_result.exit_code}\\n{compile_result.stderr}\")\n\n        return compile_result\n\n    async def _run_tests(self, instance: Instance, data: Dict[str, Any]) -> Tuple[str, str]:\n        \"\"\"\n        Run tests and evaluate results.\n\n        Args:\n            instance: The MorphCloud instance\n            data: Dictionary containing runtime parameters\n\n        Returns:\n            tuple: (score, feedback)\n\n        Raises:\n            TimeoutError: If test execution times out\n        \"\"\"\n        hard_timeout = data[\"run_timeout\"] / 1000 + 3","sourceCodeStart":164,"sourceCodeEnd":200,"githubUrl":"https://github.com/huggingface/open-r1/blob/1416fa0cf21595d2083b399a2a0bbddd7f6e9563/src/open_r1/utils/competitive_programming/morph_client.py#L164-L200","documentation":"_compile_code runs ./compile inside the MorphCloud VM workspace and raises RuntimeError with the exit code and stderr when compilation fails. This is the VM-side build of the submission (plus task graders), so a failure means the submitted source does not compile in the sandbox toolchain.","triggerScenarios":"instance.aexec('cd /workspace && ./compile') returns exit_code != 0 — submitted C++/C source has compile errors, uses unsupported flags/standard, or the task's grader sources are missing/incompatible so the compile script aborts.","commonSituations":"Solution uses C++20 features while the sandbox compiler defaults to an older standard; missing #include for functions used; grader files not uploaded to /workspace; compile script failing because problem files were placed in the wrong paths.","solutions":["Read stderr in the error message — it contains the compiler diagnostics; fix the offending lines in the submission.","Compile the same source locally with the same compiler/standard the IOI package uses to reproduce and fix errors quickly.","Verify all required files (solution + graders) were uploaded to /workspace with the layout ./compile expects.","If you control the sandbox, ensure the compile script and toolchain version match the expected IOI environment."],"exampleFix":"// before: fails on older sandbox gcc\nfor (auto x : views::iota(0, n)) { ... }\n// after: C++17-compatible loop\nfor (int i = 0; i < n; ++i) { ... }","handlingStrategy":"validation","validationCode":"import subprocess\nres = subprocess.run(['g++', '-std=c++17', '-fsyntax-only', solution_path], capture_output=True, text=True)\nif res.returncode != 0:\n    raise RuntimeError(f'Pre-submission compile check failed:\\n{res.stderr}')","typeGuard":"def compile_ok(result) -> bool:\n    return getattr(result, 'exit_code', 1) == 0","tryCatchPattern":"try:\n    score, feedback = await morph_client.execute(data)\nexcept RuntimeError as e:\n    if 'Compilation error' in str(e):\n        logger.error('Submission failed to compile in sandbox:\\n%s', e)\n        return '0', 'Compilation error'\n    raise","preventionTips":["Compile locally with the sandbox's compiler standard before batch submission","Avoid bleeding-edge language features not guaranteed on the worker image","Ensure grader sources are uploaded with the correct paths","Run a smoke submission per problem before full evaluation"],"tags":["morphcloud","compilation","sandbox-execution"],"backgroundTag":"compilation-failed","analyzedSha":"1416fa0cf21595d2083b399a2a0bbddd7f6e9563","analyzedAt":"2026-08-30T08:56:53.400Z","schemaVersion":2},"datasetVersion":"2026-08-30T13:17:10.514Z"}