René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Crash in '{using x=null, {}=null;}'","articleBody":"### Version\n\nv25.9.0\n\n### Platform\n\n```text\nLinux vm 6.12.73+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.73-1 (2026-02-17) x86_64 GNU/Linux;\nLinux vm 6.12.63+deb13-arm64 #1 SMP Debian 6.12.63-1 (2025-12-30) aarch64 GNU/Linux\n```\n\n### Subsystem\n\n_No response_\n\n### What steps will reproduce the bug?\n\nCrashes in some tests from test262:\n\n```\ntest/language/statements/using/syntax/using-invalid-arraybindingpattern-after-bindingidentifier.js\ntest/language/statements/using/syntax/using-invalid-objectbindingpattern-after-bindingidentifier.js\ntest/language/statements/await-using/syntax/await-using-invalid-arraybindingpattern-after-bindingidentifier.js\ntest/language/statements/await-using/syntax/await-using-invalid-objectbindingpattern-after-bindingidentifier.js\n```\n\nReproducible without any special flags. Taking the first one as example:\n\n```\n$ node -e '{using x=null, {}=null;}'\n\n  #  node[334]: std::string node::GetErrorSource(Isolate *, Local\u003cContext\u003e, Local\u003cMessage\u003e, bool *) at ../src/node_errors.cc:154\n  #  Assertion failed: (end) \u003e= (start)\n\n----- Native stack trace -----\n\n 1: 0x90ace8 node::Assert(node::AssertionInfo const\u0026) [node]\n 2: 0x90abf1  [node]\n 3: 0x90ae92 node::AppendExceptionLine(node::Environment*, v8::Local\u003cv8::Value\u003e, v8::Local\u003cv8::Message\u003e, node::ErrorHandlingMode) [node]\n 4: 0x90e43c node::errors::DecorateErrorStack(node::Environment*, v8::Local\u003cv8::Value\u003e, v8::Local\u003cv8::Message\u003e) [node]\n 5: 0x8f2e54 node::contextify::ContextifyScript::New(v8::FunctionCallbackInfo\u003cv8::Value\u003e const\u0026) [node]\n 6: 0xbecf61  [node]\n 7: 0xbeca9d  [node]\n 8: 0xbec3f7  [node]\n 9: 0x70275363adf6 \n\n----- JavaScript stack trace -----\n\n1: makeContextifyScript (node:internal/vm:194:14)\n2: compileScript (node:internal/process/execution:420:10)\n3: evalTypeScript (node:internal/process/execution:292:22)\n4: node:internal/main/eval_string:71:3\n\n\nAborted\n```\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\nShould throw a SyntaxError, never crash.\n\n### What do you see instead?\n\nSIGABRT\n\n### Additional information\n\n_No response_","author":{"url":"https://github.com/ivankra","@type":"Person","name":"ivankra"},"datePublished":"2026-04-16T02:44:52.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/62767/node/issues/62767"}