René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`test-fs-cp-async-socket` / `test-fs-cp-sync-copy-socket-error` failure on Darwin (path length)","articleBody":"Refs: https://github.com/nodejs/node/pull/66259#issuecomment-5836477902\n\n## Situation\n\nhttps://github.com/nodejs/node/blob/v26.x/test/parallel/test-fs-cp-async-socket.mjs &\nhttps://github.com/nodejs/node/blob/v26.x/test/parallel/test-fs-cp-sync-copy-socket-error.mjs\n\nfail when running in GitHub Actions\nhttps://github.com/nodejs/node/blob/v26.x/.github/workflows/test-shared.yml and only in the darwin (macOS) jobs:\n\n- x86_64-darwin: with shared libraries\n- aarch64-darwin: with shared libraries\n\nhttps://github.com/nodejs/node/pull/66163 showed the error when it was landed in https://github.com/nodejs/node/commit/151845ab90d3926ceb36eedf1eade09619c3adc9\n\n`address: '/Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/.tmp.1214/copy_%1/42770.sock'`\n\nshows a path length of 106 characters\n\n```console\n$ echo \"/Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/.tmp.1214/copy_%1/42770.sock\" | wc -c\n106\n```\n\n`sun_path` is limited to 104 bytes on macOS (typically 103 bytes + terminating `NUL`), so the path described above exceeds the limits.\n\nCloning the `node` repo to Ubuntu under a long path, such as `A23456789-B23456789-C23456789-D23456789-E23456789-F23456789-G` also allows reproduction with:\n\n```shell\npython3 tools/test.py parallel/test-fs-cp-async-socket.mjs\n```\n\n## Logs\n\nSee https://github.com/nodejs/node/actions/runs/35540304798/job/106156822961\n\n```console\n=== release test-fs-cp-async-socket ===\nPath: parallel/test-fs-cp-async-socket\nError: --- stderr ---\nnode:events:505\n    throw er; // Unhandled 'error' event\n    ^\n\nError: listen EINVAL: invalid argument /Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/.tmp.1214/copy_%1/42770.sock\n    at Server.setupListenHandle [as _listen2] (node:net:2368:21)\n    at listenInCluster (node:net:2499:12)\n    at Server.listen (node:net:2641:5)\n    at file:///Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/parallel/test-fs-cp-async-socket.mjs:29:10\n    at ModuleJob.run (node:internal/modules/esm/module_job:569:25)\n    at async node:internal/modules/esm/loader:650:26\n    at async asyncRunEntryPointWithESMLoader (node:internal/modules/run_main:105:5)\nEmitted 'error' event on Server instance at:\n    at emitErrorNT (node:net:2478:8)\n    at process.processTicksAndRejections (node:internal/process/task_queues:90:21) {\n  code: 'EINVAL',\n  errno: -22,\n  syscall: 'listen',\n  address: '/Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/.tmp.1214/copy_%1/42770.sock',\n  port: -1\n}\n\nNode.js v26.10.0\nCommand: out/Release/node /Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/parallel/test-fs-cp-async-socket.mjs\n=== release test-fs-cp-sync-copy-socket-error ===\nPath: parallel/test-fs-cp-sync-copy-socket-error\nError: --- stderr ---\nnode:internal/modules/run_main:111\n    triggerUncaughtException(\n    ^\n\nAssertionError [ERR_ASSERTION]: Expected values to be strictly deep-equal:\n+ actual - expected\n\n  Comparison {\n+   code: 'ENOENT'\n-   code: 'ERR_FS_CP_SOCKET'\n  }\n\n    at file:///Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/parallel/test-fs-cp-sync-copy-socket-error.mjs:29:10\n    at ModuleJob.run (node:internal/modules/esm/module_job:569:25)\n    at async node:internal/modules/esm/loader:650:26\n    at async asyncRunEntryPointWithESMLoader (node:internal/modules/run_main:105:5) {\n  generatedMessage: true,\n  code: 'ERR_ASSERTION',\n  actual: Error: ENOENT: no such file or directory, lstat '/Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/.tmp.1235/copy_%1/42922.sock'\n      at cpSyncFn (node:internal/fs/cp/cp-sync:56:13)\n      at cpSync (node:fs:3846:3)\n      at assert.throws.code (file:///Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/parallel/test-fs-cp-sync-copy-socket-error.mjs:30:11)\n      at getActual (node:assert:580:5)\n      at assert.throws (node:assert:728:24)\n      at file:///Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/parallel/test-fs-cp-sync-copy-socket-error.mjs:29:10\n      at ModuleJob.run (node:internal/modules/esm/module_job:569:25)\n      at async node:internal/modules/esm/loader:650:26\n      at async asyncRunEntryPointWithESMLoader (node:internal/modules/run_main:105:5) {\n    errno: -2,\n    code: 'ENOENT',\n    syscall: 'lstat',\n    path: '/Users/runner/work/_temp/node-v26.10.0-nightly2026-09-208469b59d62-slim/test/.tmp.1235/copy_%1/42922.sock'\n  },\n  expected: { code: 'ERR_FS_CP_SOCKET' },\n  operator: 'throws',\n  diff: 'simple'\n}\n```\n","author":{"url":"https://github.com/MikeMcC399","@type":"Person","name":"MikeMcC399"},"datePublished":"2026-09-26T17:12:43Z","url":"https://github.com/nodejs/node/issues/66324"}