René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ffi: segfault when a signature getter closes the library in getFunction()","articleBody":"### Version\n\nmain\n\n### Platform\n\n```text\nmacOS 26.7.0\n```\n\n### Subsystem\n\nffi\n\n### What steps will reproduce the bug?\n\n```js\nimport { DynamicLibrary } from 'node:ffi';\nconst lib = new DynamicLibrary(process.argv[2]);\n\nlib.getFunction('add_i32', { arguments: ['i32', 'i32'], return: 'i32' });\nlib.getFunction('add_i32', {\n  arguments: ['i32', 'i32'],\n  get return() { lib.close(); return 'i32'; },\n});\n```\n\nRun with `node repro.js`, using any shared library that exports `add_i32` (for example, `test/ffi/fixture_library`)\n\n### How often does it reproduce? Is there a required condition?\n\nAlways\n\n### What is the expected behavior? Why is that the expected behavior?\n\nThe second call should throw `ERR_FFI_LIBRARY_CLOSED`, the same error `getFunction()` throws on a closed library.\n\n### What do you see instead?\n\nThe process crashes with a segmentation fault (exit code 139).\n\n### Additional information\n\n_No response_","author":{"url":"https://github.com/trivikr","@type":"Person","name":"trivikr"},"datePublished":"2026-09-28T03:21:15Z","url":"https://github.com/nodejs/node/issues/66367"}