Dragonfly crashes during RaxTreeMap::try_emplace

[BagritsevichStepan]

We are getting two different crashes:

*** SIGSEGV received at time=1732872590 on cpu 0 ***

PC: @ 0x58984f9d8481 (unknown) raxLowWalk
@ 0x58984fc2d244 64 absl::lts_20240116::WriteFailureInfo()
@ 0x58984fc2d4c0 96 absl::lts_20240116::AbslFailureSignalHandler()

@ 0x7018ddc45320 1568 (unknown)
@ 0x58984f90991f 96 raxFind
@ 0x58984f8e50e1 176 dfly::search::RaxTreeMap<>::find()
@ 0x58984f8e57cf 256 dfly::search::RaxTreeMap<>::try_emplace<>()
@ 0x58984f8dc755 208 dfly::search::BaseStringIndex<>::GetOrCreate()
@ 0x58984f8dbadc 272 dfly::search::BaseStringIndex<>::Add()
@ 0x58984f8a2cbb 144 dfly::search::FieldIndices::Add()::{lambda()#1}::operator()<>
@ 0x58984f8a2f65 208 dfly::search::FieldIndices::Add()
@ 0x58984f46e7eb 64 dfly::ShardDocIndex::Rebuild()::{lambda()#1}::operator()()
@ 0x58984f471c30 128 dfly::(anonymous namespace)::TraverseAllMatching<>()::{lambda()#1}::operator()()
@ 0x58984f4723e5 80 dfly::DashTable<>::Traverse<>()::{lambda()#1}::operator()()
@ 0x58984f473512 80 dfly::detail::Segment<>::TraverseLogicalBucket<>()::{lambda()#1}::operator()<>
@ 0x58984f47359d 64 dfly::detail::Segment<>::Bucket::ForEachSlotImpl<>()
@ 0x58984f472fea 32 dfly::detail::Segment<>::Bucket::ForEachSlot<>() 
@ 0x58984f472aa0 128 dfly::detail::Segment<>::TraverseLogicalBucket<>()
@ 0x58984f472519 128 dfly::DashTable<>::Traverse<>()
@ 0x58984f471e6c 256 dfly::(anonymous namespace)::TraverseAllMatching<>()
@ 0x58984f46e904 192 dfly::ShardDocIndex::Rebuild()
@ 0x58984f4706b5 192 dfly::ShardDocIndices::InitIndex()
@ 0x58984f3c224f 128 dfly::SearchFamily::FtCreate()::{lambda()#2}::operator()()

Another one:

db        | *** SIGSEGV received at time=1731953361 on cpu 1 ***
db        | PC: @       0x5567a95628  (unknown)  jsoncons::basic_json<>::uninitialized_copy()
db        |     @       0x55683ef924        480  absl::lts_20240116::AbslFailureSignalHandler()
db        |     @       0x7fa22577a0       4960  (unknown)
db        |     @       0x5567bef6bc        128  std::vector<>::_M_realloc_insert<>()
db        |     @       0x556814a328         96  dfly::json::detail::Dfs::PerformStep()
db        |     @       0x556814ad18        256  dfly::json::detail::Dfs::Traverse()
db        | [failure_signal_handler.cc : 345] RAW: Signal 11 raised at PC=0x5567dc05e8 while already in AbslFailureSignalHandler()
db        |     @       0x556813dacc        208  dfly::json::EvaluatePath()
db        |     @       0x5567be7ec0        240  std::__detail::__variant::__gen_vtable_impl<>::__visit_invoke()
db        |     @       0x5567be43a4         48  dfly::JsonAccessor::GetStrings()
db        |     @       0x5567dc9a34        256  dfly::search::BaseStringIndex<>::Add()
db        |     @       0x5567da9920        336  dfly::search::FieldIndices::Add()
db        |     @       0x5567bdb324        112  dfly::ShardDocIndex::Rebuild()
db        |     @       0x5567bdd968        384  dfly::ShardDocIndices::InitIndex()
db        |     @       0x5567b8ddec        240  absl::lts_20240116::functional_internal::InvokeObject<>()
db        |     @       0x5567d31b28        112  dfly::Transaction::RunCallback()
db        |     @       0x5567d34554        304  dfly::Transaction::RunInShard()
db        |     @       0x5567c83d54        384  dfly::EngineShard::PollExecution()
db        |     @       0x5567d2dc64        352  std::_Function_handler<>::_M_invoke()
db        | [failure_signal_handler.cc : 345] RAW: Signal 11 raised at PC=0x5567e3e460 while already in AbslFailureSignalHandler()
db        |     @       0x55681e66d0        144  util::fb2::FiberQueue::Run()
db        | [failure_signal_handler.cc : 345] RAW: Signal 11 raised at PC=0x5567e3db78 while already in AbslFailureSignalHandler()
db        |     @       0x5567d75dd4        288  boost::context::detail::fiber_entry<>()

The problem occurs due to elements destructing in the RaxTreeMap::~RaxTreeMap().