Fixed by #96
Status: Fixed

The issue had nothing to do with shared_ptr and everything to do with adding objects to the runtime from threads.
Status: Fixed

Fixed in r509. Note that you have a typo in your chaiscript: you are attempting to access the member variable srcAeTitle which is not exposed to the chaiscript engine. You will see the exception for that problem after trying latest svn.

similar to issue 96, here is the sample app that shows crash (again originally noticed on windows VS2008 but app recreated and tested on linux)

ok i'm attaching sample app that shows same exception this time i tested it on linux with same version of chaiscript (2.3.3) different version of boost (1.42) [originally problem appeared on windows Visual Studio 2008 with boost 1.43 i tried to simulate original flow as much as i could.

im trying to prepare example app that will show this issue hopefully. in meantime info that this is with VisualStudio 2008

OK having that previous problem with variables I tryed to implement my function via functor call. (so whole script is 1 function) fun(meta,dicom) { print(meta.srcAeTitle); } ProcessDES now looks like this boost::call_once(&g_chaiInit,g_chaiInitOnce); g_chai.functor<void(DcDirMetaInfo_ptr,DcElemList_ptr)>(des)(pMetaInfo,pElemList); however I'm getting an exception/error when running this (at least its not a crash) Unable to pop global stack any idea why ?? functor gets executed correctly, it happens somewhere on cleanup.

I'm getting crash when trying to add a shared_ptr<> variable (first variable) to the chaiscript. it seems like its accessing non exisiting index or element. void add_object(const std::string &name, const Boxed_Value &obj) { StackData &stack = get_stack_data(); validate_object_name(name); stack.get<0>().erase(name); stack.get<1>().back()[name] = obj; } it happens on last line of this method. this is the setup (processDES can be called from multiple threads ) static chaiscript::ChaiScript g_chai; static boost::once_flag g_chaiInitOnce = BOOST_ONCE_INIT; void g_chaiInit() { g_chai.add(chaiscript::fun(&parseHex),"hex"); g_chai.add(chaiscript::fun(&getTagValue),"getTag"); g_chai.add(chaiscript::fun(&setTagValue),"setTag"); } void processDES(DcDirMetaInfo_ptr pMetaInfo,DcElemList_ptr pElemList,const string& des) { boost::call_once(&g_chaiInit,g_chaiInitOnce); g_chai.add(chaiscript::var(pElemList),"dicom"); // This is the call that crashes in add_object g_chai.add(chaiscript::var(pMetaInfo),"meta"); g_chai.eval(des); } any ideas ?