{"record":{"id":"ae3ecd7c788cb096","repo":"sgl-project/sglang","slug":"could-not-create-an-import-spec-for-module-name","errorCode":null,"errorMessage":"could not create an import spec for {module_name} at {path}","messagePattern":"could not create an import spec for (.+?) at (.+?)","errorType":"exception","errorClass":"ImportError","httpStatus":null,"severity":"error","filePath":"python/sglang/srt/rust_extensions/loader.py","lineNumber":402,"sourceCode":"            os.fsync(destination_file.fileno())\n        temporary_path.chmod(0o755)\n        os.replace(temporary_path, destination)\n        directory_descriptor = os.open(destination.parent, os.O_RDONLY)\n        try:\n            os.fsync(directory_descriptor)\n        finally:\n            os.close(directory_descriptor)\n    finally:\n        temporary_path.unlink(missing_ok=True)\n\n\ndef _load_extension_from_path(module_name: str, path: Path) -> ModuleType:\n    loaded = sys.modules.get(module_name)\n    if loaded is not None:\n        return loaded\n    module_spec = importlib.util.spec_from_file_location(module_name, path)\n    if module_spec is None or module_spec.loader is None:\n        raise ImportError(\n            f\"could not create an import spec for {module_name} at {path}\"\n        )\n    module = importlib.util.module_from_spec(module_spec)\n    sys.modules[module_name] = module\n    try:\n        module_spec.loader.exec_module(module)\n    except BaseException:\n        sys.modules.pop(module_name, None)\n        raise\n    return module\n","sourceCodeStart":384,"sourceCodeEnd":413,"githubUrl":"https://github.com/sgl-project/sglang/blob/0132848349585cfe6aae51c4941cbae872505f8a/python/sglang/srt/rust_extensions/loader.py#L384-L413","documentation":"importlib.util.spec_from_file_location returned an unusable spec (None or spec.loader None) for the built extension file, so it cannot be imported by path.","triggerScenarios":"Loading the staged .so/.pyd file on a platform where the suffix has no registered import loader, or a corrupt/empty file.","commonSituations":"Renamed extension file with unsupported suffix; truncated build artifact; mismatched Python ABI making the loader unavailable.","solutions":["Verify the file exists, is non-empty, and ends with sysconfig's EXT_SUFFIX","Rebuild the artifact","Import with a matching Python version/ABI"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"import importlib.util, sysconfig\np = str(path)\nassert p.endswith(sysconfig.get_config_var(\"EXT_SUFFIX\")) and path.stat().st_size > 0","typeGuard":null,"tryCatchPattern":"try:\n    _load_extension_from_path(name, path)\nexcept ImportError as e:\n    rebuild_and_retry(name, path)","preventionTips":["Verify artifact size/suffix before loading","Match Python ABI between build and load environments"],"tags":["python","import","importlib","native-extension"],"backgroundTag":"extension-import-failed","analyzedSha":"0132848349585cfe6aae51c4941cbae872505f8a","analyzedAt":"2026-08-28T05:10:05.995Z","schemaVersion":2},"datasetVersion":"2026-08-28T06:17:29.519Z"}