Crash when accessing python data via JavaScript

[GoogleCodeExporter]

Forgive me for not creating a minimal example of the problem yet.  Here's a 
rough explanation.

I'm creating dicts in Python and then pushing the dicts into a JavaScript 
array.  Something like this:

data = [];
for (n = 0; n < itemlen; n++) {
  item = pyfunc(n);
  data.push(item);
}

Later on I return data back to python by calling JSON.stringify(data)

In recent builds, on Mac OS (I haven't tested Windows), PyV8 crashes with a 
segmentation fault.  Interestingly, when I loop through data, passing each item 
back to Python, the crash doesn't happen.

Please let me know what I can do to help resolve this problem.

Here's the relevant part of the crash info:

Process:         Python [54082]
Path:            
/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/
MacOS/Python
Identifier:      org.python.python
Version:         2.7.4 (2.7.4)
Code Type:       X86-64 (Native)
Parent Process:  bash [62168]
User ID:         501

Date/Time:       2013-05-01 23:56:37.232 -0400
OS Version:      Mac OS X 10.8.2 (12C2034)
Report Version:  10

Interval Since Last Report:          285252 sec
Crashes Since Last Report:           28
Per-App Interval Since Last Report:  626 sec
Per-App Crashes Since Last Report:   24
Anonymous UUID:                      4E302A2E-F17C-8944-CFBD-D3F305073F4F

Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000098

VM Regions Near 0x98:
--> 
    __TEXT                 0000000100000000-0000000100001000 [    4K] r-x/rwx SM=COW  /Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python

Application Specific Information:
Performing @selector(clickedAction:) from sender wxNSMenuItem 0x109753510

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   org.python.python               0x00000001000545c1 dict_dealloc + 33
1   _PyV8.so                        0x000000010860993a 
ObjectTracer::~ObjectTracer() + 154
2   _PyV8.so                        0x0000000108609ba9 
ObjectTracer::WeakCallback(v8::Persistent<v8::Value>, void*) + 25
3   _PyV8.so                        0x000000010872e96d 
v8::internal::GlobalHandles::Node::PostGarbageCollectionProcessing(v8::internal:
:Isolate*, v8::internal::GlobalHandles*) + 301
4   _PyV8.so                        0x000000010872dd03 
v8::internal::GlobalHandles::PostGarbageCollectionProcessing(v8::internal::Garba
geCollector, v8::internal::GCTracer*) + 115
5   _PyV8.so                        0x000000010874a289 
v8::internal::Heap::PerformGarbageCollection(v8::internal::GarbageCollector, 
v8::internal::GCTracer*) + 1817
6   _PyV8.so                        0x0000000108749a9c 
v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, 
v8::internal::GarbageCollector, char const*, char const*) + 428
7   _PyV8.so                        0x0000000108713443 
v8::internal::Factory::NewRawOneByteString(int, v8::internal::PretenureFlag) + 
131
8   _PyV8.so                        0x000000010888ec79 
v8::internal::BasicJsonStringifier::Extend() + 281
9   _PyV8.so                        0x000000010888f1de 
v8::internal::BasicJsonStringifier::SerializeString(v8::internal::Handle<v8::int
ernal::String>) + 910
10  _PyV8.so                        0x00000001088cd48b 
v8::internal::BasicJsonStringifier::Result 
v8::internal::BasicJsonStringifier::Serialize_<true>(v8::internal::Handle<v8::in
ternal::Object>, bool, v8::internal::Handle<v8::internal::Object>) + 667
11  _PyV8.so                        0x00000001088cce3f 
v8::internal::BasicJsonStringifier::Result 
v8::internal::BasicJsonStringifier::Serialize_<false>(v8::internal::Handle<v8::i
nternal::Object>, bool, v8::internal::Handle<v8::internal::Object>) + 3791
12  _PyV8.so                        0x00000001088cd9ae 
v8::internal::BasicJsonStringifier::Result 
v8::internal::BasicJsonStringifier::Serialize_<true>(v8::internal::Handle<v8::in
ternal::Object>, bool, v8::internal::Handle<v8::internal::Object>) + 1982
13  _PyV8.so                        0x00000001088cce3f 
v8::internal::BasicJsonStringifier::Result 
v8::internal::BasicJsonStringifier::Serialize_<false>(v8::internal::Handle<v8::i
nternal::Object>, bool, v8::internal::Handle<v8::internal::Object>) + 3791
14  _PyV8.so                        0x000000010888e440 
v8::internal::BasicJsonStringifier::Stringify(v8::internal::Handle<v8::internal:
:Object>) + 32
15  _PyV8.so                        0x00000001088a3431 
v8::internal::Runtime_BasicJSONStringify(int, v8::internal::Object**, 
v8::internal::Isolate*) + 225
16  ???                             0x0000023b6e80616e 0 + 2454280233326
17  ???                             0x0000023b6e839bfb 0 + 2454280444923
18  ???                             0x0000023b6e80bb14 0 + 2454280256276
19  ???                             0x0000023b6e832e4c 0 + 2454280416844
20  ???                             0x0000023b6e825b64 0 + 2454280362852
21  ???                             0x0000023b6e8077f7 0 + 2454280239095
22  _PyV8.so                        0x000000010870a91c 
v8::internal::Invoke(bool, v8::internal::Handle<v8::internal::JSFunction>, 
v8::internal::Handle<v8::internal::Object>, int, 
v8::internal::Handle<v8::internal::Object>*, bool*) + 396
23  _PyV8.so                        0x0000000108697e8a v8::Script::Run() + 490
24  _PyV8.so                        0x00000001085e256b 
CEngine::ExecuteScript(v8::Handle<v8::Script>) + 235
25  _PyV8.so                        0x00000001085e26e5 CScript::Run() + 53
26  _PyV8.so                        0x00000001085d74aa 
CContext::EvaluateW(std::basic_string<wchar_t, std::char_traits<wchar_t>, 
std::allocator<wchar_t> > const&, std::basic_string<wchar_t, 
std::char_traits<wchar_t>, std::allocator<wchar_t> >, int, int, 
boost::python::api::object) + 250
27  _PyV8.so                        0x00000001085df353 
boost::python::detail::caller_arity<6u>::impl<boost::python::api::object 
(CContext::*)(std::basic_string<wchar_t, std::char_traits<wchar_t>, 
std::allocator<wchar_t> > const&, std::basic_string<wchar_t, 
std::char_traits<wchar_t>, std::allocator<wchar_t> >, int, int, 
boost::python::api::object), boost::python::default_call_policies, 
boost::mpl::vector7<boost::python::api::object, CContext&, 
std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > 
const&, std::basic_string<wchar_t, std::char_traits<wchar_t>, 
std::allocator<wchar_t> >, int, int, boost::python::api::object> 
>::operator()(_object*, _object*) + 1155
28  libboost_python-mt.dylib        0x00000001069d237e 
boost::python::objects::function::call(_object*, _object*) const + 766
29  libboost_python-mt.dylib        0x00000001069d447a 
boost::detail::function::void_function_ref_invoker0<boost::python::objects::(ano
nymous namespace)::bind_return, 
void>::invoke(boost::detail::function::function_buffer&) + 26
30  libboost_python-mt.dylib        0x00000001069da65c 
boost::function0<void>::operator()() const + 28
31  libboost_python-mt.dylib        0x00000001069da37c 
boost::python::detail::exception_handler::operator()(boost::function0<void> 
const&) const + 28
32  _PyV8.so                        0x00000001085cee92 
boost::detail::function::function_obj_invoker2<boost::_bi::bind_t<bool, 
boost::python::detail::translate_exception<CJavascriptException, void 
(*)(CJavascriptException const&)>, boost::_bi::list3<boost::arg<1>, 
boost::arg<2>, boost::_bi::value<void (*)(CJavascriptException const&)> > >, 
bool, boost::python::detail::exception_handler const&, boost::function0<void> 
const&>::invoke(boost::detail::function::function_buffer&, 
boost::python::detail::exception_handler const&, boost::function0<void> const&) 
+ 34
33  libboost_python-mt.dylib        0x00000001069da578 
boost::python::detail::exception_handler::handle(boost::function0<void> const&) 
const + 40
34  libboost_python-mt.dylib        0x00000001069da1cd 
boost::python::handle_exception_impl(boost::function0<void>) + 29
35  libboost_python-mt.dylib        0x00000001069d3e83 function_call + 83
36  org.python.python               0x000000010000c9a2 PyObject_Call + 98
37  org.python.python               0x00000001000c0b18 PyEval_EvalFrameEx + 14024
38  org.python.python               0x00000001000c5999 PyEval_EvalCodeEx + 2137
39  org.python.python               0x00000001000c328d PyEval_EvalFrameEx + 24125
40  org.python.python               0x00000001000c5999 PyEval_EvalCodeEx + 2137
41  org.python.python               0x00000001000c328d PyEval_EvalFrameEx + 24125
42  org.python.python               0x00000001000c5999 PyEval_EvalCodeEx + 2137
43  org.python.python               0x000000010003e580 function_call + 176
44  org.python.python               0x000000010000c9a2 PyObject_Call + 98
45  org.python.python               0x000000010001f0bb instancemethod_call + 363
46  org.python.python               0x000000010000c9a2 PyObject_Call + 98
47  org.python.python               0x00000001000bc197 
PyEval_CallObjectWithKeywords + 87
48  _core_.so                       0x00000001011c88af 
wxPyCallback::EventThunker(wxEvent&) + 319
49  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001015e50b4 
wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, 
wxEvtHandler*, wxEvent&) + 84
50  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001015e619f 
wxEvtHandler::SearchDynamicEventTable(wxEvent&) + 111
51  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001015e72e8 
wxEvtHandler::TryHereOnly(wxEvent&) + 40
52  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001015e74c9 
wxEvtHandler::ProcessEvent(wxEvent&) + 265
53  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001015e51ab 
wxEvtHandler::DoTryChain(wxEvent&) + 75
54  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001015e73aa 
wxEvtHandler::ProcessEventLocally(wxEvent&) + 74
55  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001015e7405 
wxEvtHandler::ProcessEvent(wxEvent&) + 69
56  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001015e6d76 
wxEvtHandler::SafelyProcessEvent(wxEvent&) + 22
57  libwx_osx_cocoau-2.9.5.0.0.dylib    0x0000000101821670 
wxWindowBase::HandleWindowEvent(wxEvent&) const + 16
58  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001017ceecb 
wxMenuBase::SendEvent(int, int) + 219
59  libwx_osx_cocoau-2.9.5.0.0.dylib    0x000000010164ce41 
wxMenu::HandleCommandProcess(wxMenuItem*, wxWindow*) + 97
60  com.apple.AppKit                0x00007fff88f2ea59 -[NSApplication 
sendAction:to:from:] + 342
61  com.apple.AppKit                0x00007fff8906444c -[NSMenuItem 
_corePerformAction] + 406
62  com.apple.AppKit                0x00007fff8906413a -[NSCarbonMenuImpl 
performActionWithHighlightingForItemAtIndex:] + 133
63  com.apple.AppKit                0x00007fff88d5146f -[NSMenu 
_internalPerformActionForItemAtIndex:] + 36
64  com.apple.AppKit                0x00007fff88d512f7 -[NSCarbonMenuImpl 
_carbonCommandProcessEvent:handlerCallRef:] + 135
65  com.apple.AppKit                0x00007fff8905d245 NSSLMMenuEventHandler + 
342
66  com.apple.HIToolbox             0x00007fff85225f0a 
DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 
1206
67  com.apple.HIToolbox             0x00007fff852253d9 
SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, 
HandlerCallRec*) + 410
68  com.apple.HIToolbox             0x00007fff8523b1bd SendEventToEventTarget + 
40
69  com.apple.HIToolbox             0x00007fff85271e89 
SendHICommandEvent(unsigned int, HICommand const*, unsigned int, unsigned int, 
unsigned char, void const*, OpaqueEventTargetRef*, OpaqueEventTargetRef*, 
OpaqueEventRef**) + 443
70  com.apple.HIToolbox             0x00007fff85216c11 
SendMenuCommandWithContextAndModifiers + 59
71  com.apple.HIToolbox             0x00007fff85216bc3 SendMenuItemSelectedEvent 
+ 254
72  com.apple.HIToolbox             0x00007fff85216a4f 
FinishMenuSelection(SelectionData*, MenuResult*, MenuResult*) + 94
73  com.apple.HIToolbox             0x00007fff851f2aab MenuSelectCore(MenuData*, 
Point, double, unsigned int, OpaqueMenuRef**, unsigned short*) + 605
74  com.apple.HIToolbox             0x00007fff851f20b8 _HandleMenuSelection2 + 
565
75  com.apple.AppKit                0x00007fff88f1c9c6 _NSHandleCarbonMenuEvent 
+ 245
76  com.apple.AppKit                0x00007fff88e3eb7f _DPSNextEvent + 2073
77  com.apple.AppKit                0x00007fff88e3ded2 -[NSApplication 
nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
78  com.apple.AppKit                0x00007fff88e35283 -[NSApplication run] + 517
79  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001016e0163 wxGUIEventLoop::DoRun() 
+ 51
80  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001015b1d07 wxCFEventLoop::Run() + 
55
81  libwx_osx_cocoau-2.9.5.0.0.dylib    0x00000001014b0008 
wxAppConsoleBase::MainLoop() + 72
82  _core_.so                       0x00000001011c372c wxPyApp::MainLoop() + 76
83  _core_.so                       0x000000010120fe3f 
wxPySizer::wxCreateObject() + 202719
84  org.python.python               0x00000001000c3b12 PyEval_EvalFrameEx + 26306
85  org.python.python               0x00000001000c5999 PyEval_EvalCodeEx + 2137
86  org.python.python               0x000000010003e580 function_call + 176
87  org.python.python               0x000000010000c9a2 PyObject_Call + 98
88  org.python.python               0x000000010001f0bb instancemethod_call + 363
89  org.python.python               0x000000010000c9a2 PyObject_Call + 98
90  org.python.python               0x00000001000c0b18 PyEval_EvalFrameEx + 14024
91  org.python.python               0x00000001000c40bd PyEval_EvalFrameEx + 27757
92  org.python.python               0x00000001000c5999 PyEval_EvalCodeEx + 2137
93  org.python.python               0x00000001000c5ab6 PyEval_EvalCode + 54
94  org.python.python               0x00000001000ea32e PyRun_FileExFlags + 174
95  org.python.python               0x00000001000ea5ca PyRun_SimpleFileExFlags + 
458
96  org.python.python               0x000000010010155d Py_Main + 3101
97  org.python.python               0x0000000100000f14 0x100000000 + 3860

Original issue reported on code.google.com by [email protected] on 2 May 2013 at 3:59