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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Fatal Error in V8 Debugging Context on Node.js v23.7.0","articleBody":"### Version\n\n23.7.0\n\n### Platform\n\n```text\nDarwin Apples-MacBook-Pro.local 24.3.0 Darwin Kernel Version 24.3.0: Thu Jan  2 20:24:16 PST 2025; root:xnu-11215.81.4~3/RELEASE_ARM64_T6000 arm64\n```\n\n### Subsystem\n\n_No response_\n\n### What steps will reproduce the bug?\n\n- Run a script that involves debugging, breakpoints, or function scope evaluation\n- Observe the crash with the fatal error\n\n### How often does it reproduce? Is there a required condition?\n\nThe issue reproduces consistently when running a script that involves debugging, particularly with breakpoints, function scope evaluation, or closures.\n\n### What is the expected behavior? Why is that the expected behavior?\n\nThe debugger should pause execution at the debugger; statement and allow the user to inspect variables within the function's scope without causing a crash or becoming unresponsive.\n\n### What do you see instead?\n\nI encountered a fatal error while running Node.js v23.7.0, leading to a crash with the following message:\n\n# Fatal error in , line 0  \n# Check failed: needs_context \u0026\u0026 current_scope_ == closure_scope_ \u0026\u0026 current_scope_-\u003eis_function_scope() \u0026\u0026 !function_.is_null() implies function_-\u003econtext() != *context_.  \n\n\n### Additional information\n\nComplete Error log trace if required\n\n#\n# Fatal error in , line 0\n# Check failed: needs_context \u0026\u0026 current_scope_ == closure_scope_ \u0026\u0026 current_scope_-\u003eis_function_scope() \u0026\u0026 !function_.is_null() implies function_-\u003econtext() != *context_.\n#\n#\n#\n#FailureMessage Object: 0x16bc90698\n----- Native stack trace -----\n\n 1: 0x1044899ac node::NodePlatform::GetStackTracePrinter()::$_0::__invoke() [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n 2: 0x104f00f88 V8_Fatal(char const*, ...) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n 3: 0x1046b264c v8::internal::ScopeIterator::start_position() [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n 4: 0x1046b2fec v8::internal::ScopeIterator::VisitLocalScope(std::__1::function\u003cbool (v8::internal::Handle\u003cv8::internal::String\u003e, v8::internal::Handle\u003cv8::internal::Object\u003e, v8::internal::ScopeIterator::ScopeType)\u003e const\u0026, v8::internal::ScopeIterator::Mode, v8::internal::ScopeIterator::ScopeType) const [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n 5: 0x1046b254c v8::internal::ScopeIterator::ScopeObject(v8::internal::ScopeIterator::Mode) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n 6: 0x104aa2fb0 v8_inspector::V8DebuggerAgentImpl::currentCallFrames(std::__1::unique_ptr\u003cstd::__1::vector\u003cstd::__1::unique_ptr\u003cv8_inspector::protocol::Debugger::CallFrame, std::__1::default_delete\u003cv8_inspector::protocol::Debugger::CallFrame\u003e\u003e, std::__1::allocator\u003cstd::__1::unique_ptr\u003cv8_inspector::protocol::Debugger::CallFrame, std::__1::default_delete\u003cv8_inspector::protocol::Debugger::CallFrame\u003e\u003e\u003e\u003e, std::__1::default_delete\u003cstd::__1::vector\u003cstd::__1::unique_ptr\u003cv8_inspector::protocol::Debugger::CallFrame, std::__1::default_delete\u003cv8_inspector::protocol::Debugger::CallFrame\u003e\u003e, std::__1::allocator\u003cstd::__1::unique_ptr\u003cv8_inspector::protocol::Debugger::CallFrame, std::__1::default_delete\u003cv8_inspector::protocol::Debugger::CallFrame\u003e\u003e\u003e\u003e\u003e\u003e*) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n 7: 0x104aa280c v8_inspector::V8DebuggerAgentImpl::didPause(int, v8::Local\u003cv8::Value\u003e, std::__1::vector\u003cint, std::__1::allocator\u003cint\u003e\u003e const\u0026, v8::debug::ExceptionType, bool, v8::base::EnumSet\u003cv8::debug::BreakReason, int\u003e) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n 8: 0x104ab56b4 v8_inspector::V8InspectorImpl::forEachSession(int, std::__1::function\u003cvoid (v8_inspector::V8InspectorSessionImpl*)\u003e const\u0026) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n 9: 0x104aaaa40 v8_inspector::V8Debugger::handleProgramBreak(v8::Local\u003cv8::Context\u003e, v8::Local\u003cv8::Value\u003e, std::__1::vector\u003cint, std::__1::allocator\u003cint\u003e\u003e const\u0026, v8::base::EnumSet\u003cv8::debug::BreakReason, int\u003e, v8::debug::ExceptionType, bool) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n10: 0x1046ba754 v8::internal::Debug::OnDebugBreak(v8::internal::Handle\u003cv8::internal::FixedArray\u003e, v8::internal::StepAction, v8::base::EnumSet\u003cv8::debug::BreakReason, int\u003e) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n11: 0x1046ba074 v8::internal::Debug::Break(v8::internal::JavaScriptFrame*, v8::internal::Handle\u003cv8::internal::JSFunction\u003e) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n12: 0x104a214c4 v8::internal::Runtime_DebugBreakOnBytecode(int, unsigned long*, v8::internal::Isolate*) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n13: 0x10420fc74 Builtins_CEntry_Return2_ArgvOnStack_NoBuiltinExit [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n14: 0x1042e0368 Builtins_DebugBreak3Handler [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n15: 0x104178838 Builtins_InterpreterEntryTrampoline [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n16: 0x1041b5e20 Builtins_AsyncFunctionAwaitResolveClosure [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n17: 0x104283298 Builtins_PromiseFulfillReactionJob [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n18: 0x1041a5214 Builtins_RunMicrotasks [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n19: 0x1041763f0 Builtins_JSRunMicrotasksEntry [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n20: 0x1046f2718 v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const\u0026) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n21: 0x1046f2e84 v8::internal::(anonymous namespace)::InvokeWithTryCatch(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const\u0026) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n22: 0x10471d438 v8::internal::MicrotaskQueue::PerformCheckpointInternal(v8::Isolate*) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n23: 0x10417a978 Builtins_CallApiCallbackGeneric [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n24: 0x12818bbdc \n25: 0x10417650c Builtins_JSEntryTrampoline [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n26: 0x1041761b0 Builtins_JSEntry [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n27: 0x1046f2740 v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const\u0026) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n28: 0x1046f20a8 v8::internal::Execution::Call(v8::internal::Isolate*, v8::internal::Handle\u003cv8::internal::Object\u003e, v8::internal::Handle\u003cv8::internal::Object\u003e, int, v8::internal::Handle\u003cv8::internal::Object\u003e*) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n29: 0x1045d73bc v8::Function::Call(v8::Isolate*, v8::Local\u003cv8::Context\u003e, v8::Local\u003cv8::Value\u003e, int, v8::Local\u003cv8::Value\u003e*) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n30: 0x1043316d4 node::InternalCallbackScope::Close() [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n31: 0x104331b94 node::InternalMakeCallback(node::Environment*, v8::Local\u003cv8::Object\u003e, v8::Local\u003cv8::Object\u003e, v8::Local\u003cv8::Function\u003e, int, v8::Local\u003cv8::Value\u003e*, node::async_context, v8::Local\u003cv8::Value\u003e) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n32: 0x104349c9c node::AsyncWrap::MakeCallback(v8::Local\u003cv8::Function\u003e, int, v8::Local\u003cv8::Value\u003e*) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n33: 0x10451c37c node::StreamBase::CallJSOnreadMethod(long, v8::Local\u003cv8::ArrayBuffer\u003e, unsigned long, node::StreamBase::StreamBaseJSChecks) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n34: 0x10451c600 node::EmitToJSStreamListener::OnStreamRead(long, uv_buf_t const\u0026) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n35: 0x104522b40 node::LibuvStreamWrap::OnUvRead(long, uv_buf_t const*) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n36: 0x104522848 node::LibuvStreamWrap::ReadStart()::$_1::__invoke(uv_stream_s*, long, uv_buf_t const*) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n37: 0x107a9ae6c uv__stream_io [/opt/homebrew/Cellar/libuv/1.50.0/lib/libuv.1.dylib]\n38: 0x107aa20e0 uv__io_poll [/opt/homebrew/Cellar/libuv/1.50.0/lib/libuv.1.dylib]\n39: 0x107a91f08 uv_run [/opt/homebrew/Cellar/libuv/1.50.0/lib/libuv.1.dylib]\n40: 0x104332488 node::SpinEventLoopInternal(node::Environment*) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n41: 0x10445fef0 node::NodeMainInstance::Run(node::ExitCode*, node::Environment*) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n42: 0x10445fc44 node::NodeMainInstance::Run() [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n43: 0x1043d889c node::Start(int, char**) [/opt/homebrew/Cellar/node/23.6.1/bin/node]\n44: 0x183ba0274 start [/usr/lib/dyld]","author":{"url":"https://github.com/J4Web","@type":"Person","name":"J4Web"},"datePublished":"2025-03-24T14:04:25.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/57606/node/issues/57606"}