Crash in DataTypeSynchronisationTests

[DominicFrei]

@nirinchev Reminder for us for the tests we just looked at:

1. Crash in DataTypeSynchronisationTests in one of the List tests.
2. Corrupted memory in Set_RealmValue in DataTypeTests.

[nirinchev]

I did get a crash with the following stacktrace on master, but I can't seem to repro it after I upgraded to latest v11:

>	realm-wrappers.dll!issue_debug_notification(const wchar_t * const message) Line 28	C++
 	realm-wrappers.dll!__acrt_report_runtime_error(const wchar_t * message) Line 154	C++
 	realm-wrappers.dll!abort() Line 51	C++
 	realm-wrappers.dll!please_report_this_issue_in_github_realm_realm_core() Line 51	C++
 	realm-wrappers.dll!realm::util::terminate_internal(std::basic_stringstream<char,std::char_traits<char>,std::allocator<char>> & ss) Line 124	C++
 	realm-wrappers.dll!realm::util::terminate(const char * message, const char * file, long line, std::initializer_list<realm::util::Printable> && values) Line 140	C++
 	realm-wrappers.dll!realm::`anonymous namespace'::nullify_set<realm::Mixed>(realm::Obj & obj, realm::ColKey origin_col_key, realm::Mixed target) Line 1818	C++
 	realm-wrappers.dll!realm::Obj::nullify_link(realm::ColKey origin_col_key, realm::ObjLink target_link) Line 1860	C++
 	realm-wrappers.dll!realm::CascadeState::enqueue_for_nullification(realm::Table & src_table, realm::ColKey src_col_key, realm::ObjKey origin_key, realm::ObjLink target_link) Line 1335	C++
 	realm-wrappers.dll!realm::ArrayBacklink::nullify_fwd_links(unsigned int ndx, realm::CascadeState & state) Line 57	C++
 	realm-wrappers.dll!realm::Cluster::nullify_incoming_links::__l2::<lambda>(realm::ColKey col_key) Line 948	C++
 	realm-wrappers.dll!realm::Table::for_each_backlink_column<bool <lambda>(realm::ColKey)>(realm::Cluster::nullify_incoming_links::__l2::bool <lambda>(realm::ColKey) func) Line 491	C++
 	realm-wrappers.dll!realm::Cluster::nullify_incoming_links(realm::ObjKey key, realm::CascadeState & state) Line 952	C++
 	realm-wrappers.dll!realm::ClusterTree::nullify_links(realm::ObjKey obj_key, realm::CascadeState & state) Line 1005	C++
 	realm-wrappers.dll!realm::Table::remove_object(realm::ObjKey key) Line 3402	C++
 	realm-wrappers.dll!realm::Table::invalidate_object(realm::ObjKey key) Line 3426	C++
 	realm-wrappers.dll!realm::Obj::invalidate() Line 140	C++
 	realm-wrappers.dll!realm::sync::InstructionApplier::operator()(const realm::sync::instr::EraseObject & instr) Line 176	C++
 	realm-wrappers.dll!realm::sync::Instruction::visit<realm::sync::InstructionApplier &>(realm::sync::InstructionApplier & lambda) Line 998	C++
 	realm-wrappers.dll!realm::sync::InstructionApplier::apply<realm::sync::InstructionApplier>(realm::sync::InstructionApplier & applier, const realm::sync::Changeset & changeset, realm::util::Logger * logger) Line 160	C++
 	realm-wrappers.dll!realm::_impl::ClientHistoryImpl::integrate_server_changesets(const realm::sync::SyncProgress & progress, const unsigned __int64 * downloadable_bytes, const realm::sync::Transformer::RemoteChangeset * incoming_changesets, unsigned int num_changesets, realm::sync::VersionInfo & version_info, realm::sync::ClientReplicationBase::IntegrationError & integration_error, realm::util::Logger & logger, realm::sync::ClientReplicationBase::SyncTransactReporter * transact_reporter) Line 575	C++
 	realm-wrappers.dll!realm::_impl::ClientImplBase::Session::integrate_changesets(realm::sync::ClientReplicationBase & history, const realm::sync::SyncProgress & progress, unsigned __int64 downloadable_bytes, const std::vector<realm::sync::Transformer::RemoteChangeset,std::allocator<realm::sync::Transformer::RemoteChangeset>> & received_changesets, realm::sync::VersionInfo & version_info, realm::sync::ClientReplicationBase::IntegrationError & error) Line 1735	C++
 	realm-wrappers.dll!realm::_impl::ClientImplBase::Session::initiate_integrate_changesets(unsigned __int64 downloadable_bytes, const std::vector<realm::sync::Transformer::RemoteChangeset,std::allocator<realm::sync::Transformer::RemoteChangeset>> & received_changesets) Line 1799	C++
 	realm-wrappers.dll!`anonymous namespace'::SessionImpl::initiate_integrate_changesets(unsigned __int64 downloadable_bytes, const std::vector<realm::sync::Transformer::RemoteChangeset,std::allocator<realm::sync::Transformer::RemoteChangeset>> & changesets) Line 1091	C++
 	realm-wrappers.dll!realm::_impl::ClientImplBase::Session::receive_download_message(const realm::sync::SyncProgress & progress, unsigned __int64 downloadable_bytes, const std::vector<realm::sync::Transformer::RemoteChangeset,std::allocator<realm::sync::Transformer::RemoteChangeset>> & received_changesets) Line 2682	C++
 	realm-wrappers.dll!realm::_impl::ClientImplBase::Connection::receive_download_message(unsigned __int64 session_ident, const realm::sync::SyncProgress & progress, unsigned __int64 downloadable_bytes, const std::vector<realm::sync::Transformer::RemoteChangeset,std::allocator<realm::sync::Transformer::RemoteChangeset>> & received_changesets) Line 1583	C++
 	realm-wrappers.dll!realm::_impl::ClientProtocol::parse_message_received<realm::_impl::ClientImplBase::Connection>(realm::_impl::ClientImplBase::Connection & connection, const char * data, unsigned int size) Line 302	C++
 	realm-wrappers.dll!realm::_impl::ClientImplBase::Connection::handle_message_received(const char * data, unsigned int size) Line 1208	C++
 	realm-wrappers.dll!realm::_impl::ClientImplBase::Connection::websocket_binary_message_received(const char * data, unsigned int size) Line 455	C++
 	realm-wrappers.dll!`anonymous namespace'::WebSocket::frame_reader_loop() Line 957	C++
 	realm-wrappers.dll!`anonymous-namespace'::WebSocket::frame_reader_loop::__l2::<lambda>(std::error_code ec, unsigned int __formal) Line 1004	C++
 	realm-wrappers.dll!std::_Func_impl_no_alloc<void <lambda>(std::error_code, unsigned int),void,std::error_code,unsigned int>::_Do_call(std::error_code && <_Args_0>, unsigned int && <_Args_1>) Line 921	C++
 	realm-wrappers.dll!std::_Func_class<void,std::error_code,unsigned int>::operator()(std::error_code <_Args_0>, unsigned int <_Args_1>) Line 968	C++
 	realm-wrappers.dll!realm::util::network::Service::AsyncOper::do_recycle_and_execute_helper<std::function<void __cdecl(std::error_code,unsigned int)>,std::error_code,unsigned int>(bool orphaned, bool & was_recycled, std::function<void __cdecl(std::error_code,unsigned int)> handler, std::error_code <args_0>, unsigned int <args_1>) Line 2863	C++
 	realm-wrappers.dll!realm::util::network::Service::AsyncOper::do_recycle_and_execute<std::function<void __cdecl(std::error_code,unsigned int)>,std::error_code &,unsigned int &>(bool orphaned, std::function<void __cdecl(std::error_code,unsigned int)> & handler, std::error_code & <args_0>, unsigned int & <args_1>) Line 2848	C++
 	realm-wrappers.dll!realm::util::network::Service::BasicStreamOps<realm::util::network::Socket>::BufferedReadOper<std::function<void __cdecl(std::error_code,unsigned int)>>::recycle_and_execute() Line 2719	C++
 	realm-wrappers.dll!realm::util::network::Service::Impl::execute(std::unique_ptr<realm::util::network::Service::AsyncOper,realm::util::network::Service::LendersOperDeleter> & lenders_ptr) Line 1631	C++
 	realm-wrappers.dll!realm::util::network::Service::Impl::run() Line 1392	C++
 	realm-wrappers.dll!realm::util::network::Service::run() Line 1756	C++
 	realm-wrappers.dll!`anonymous namespace'::ClientImpl::run() Line 710	C++
 	realm-wrappers.dll!realm::sync::Client::run() Line 1902	C++
 	realm-wrappers.dll!realm::_impl::SyncClient::<lambda>() Line 81	C++
 	realm-wrappers.dll!std::thread::_Invoke<std::tuple<void <lambda>(void)>,0>(void * _RawVals) Line 56	C++
 	realm-wrappers.dll!thread_start<unsigned int (__stdcall*)(void *),1>(void * const parameter) Line 97	C++

[DominicFrei]

I will keep an eye on this too as soon as I am on the latest v11. It would be good to understand the reason for this but having it solved would be a good start too I suppose. 👍

[nirinchev]

This appears to be caused by realm/realm-core#4774, so will close this one if favor of the Core issue.