René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"node:fs: calling writeFileSync/appendFileSync with negative 0 causes an assertion failure","articleBody":"### Version\n\nv26.8.1\n\n### Platform\n\n```text\nLinux nixdesk 6.18.48 #1-NixOS SMP PREEMPT_DYNAMIC Fri Aug 28 06:22:54 UTC 2026 x86_64 GNU/Linux\n```\n\n### Subsystem\n\nfs\n\n### What steps will reproduce the bug?\n\n`require(\"node:fs\").writeFileSync(-0, \"\")`\n\nor\n\n`require(\"node:fs\").appendFileSync(-0, \"\")`\n\n### How often does it reproduce? Is there a required condition?\n\nit always happens on my machine. i have not tried on any other computer or os\n\n### What is the expected behavior? Why is that the expected behavior?\n\nfor it to do the same thing as positive zero i assume\n\n### What do you see instead?\n\n```\n❯ echo 'require(\"node:fs\").writeFileSync(-0, \"\")' | node -\n\n  #  node[264400]: void node::fs::WriteFileUtf8(const v8::FunctionCallbackInfo\u003cv8::Value>&) at ../../src/node_file.cc:2764\n  #  Assertion failed: (*path) != nullptr\n\n----- Native stack trace -----\n\n 1: 0x629c801c0228  [node]\n 2: 0x629c801c0b97 node::Assert(node::AssertionInfo const&) [node]\n 3: 0x629c801cda7b  [node]\n 4: 0x729babdcfae9 \n\n----- JavaScript stack trace -----\n\n1: writeFileSync (node:fs:2997:20)\n2: [stdin]:1:20\n3: runScriptInThisContext (node:internal/vm:219:10)\n4: node:internal/process/execution:485:12\n5: [stdin]-wrapper:6:24\n6: runScriptInContext (node:internal/process/execution:483:60)\n7: evalFunction (node:internal/process/execution:317:30)\n8: evalTypeScript (node:internal/process/execution:329:3)\n9: node:internal/main/eval_stdin:51:5\n10: node:internal/process/execution:239:5\n\n\nfish: Job 1, 'echo 'require(\"node:fs\").writeF…' terminated by signal SIGABRT (Abort)\n```\n\n### Additional information\n\n_No response_","author":{"url":"https://github.com/xunuwu","@type":"Person","name":"xunuwu"},"datePublished":"2026-09-07T19:53:23Z","url":"https://github.com/nodejs/node/issues/65886"}