After upgrading from 2.0.1 to 2.1.9, met new Crash issue

[oqsh]

The language of WCDB

Objective-C

The version of WCDB

2.1.9

The platform of WCDB

iOS

The installation of WCDB

Cocoapods

What's the issue?

After upgrading from 2.0.1 to 2.1.9, met new Crash issue:

• Error info：MACH_Exception EXC_BAD_ACCESS KERN_INVALID_ADDRESS fault_address:0x0000000000000008
• Thread：Thread 30 name: (null)
• Specific Stack：

  
  1   [WMMC]  std::__1::__tree<std::__1::__value_type<unsigned int, std::__1::array<WCDB::HandlePool::ReferencedHandle, (unsigned long)10> >, std::__1::__map_value_compare<unsigned int, std::__1::__value_type<unsigned int, std::__1::array<WCDB::HandlePool::ReferencedHandle, (unsigned long)10> >, std::__1::less<unsigned int>, true>, std::__1::allocator<std::__1::__value_type<unsigned int, std::__1::array<WCDB::HandlePool::ReferencedHandle, (unsigned long)10> > > >::find<unsigned int>(unsigned int const&) (in WMMC) [inlined] __tree:2466
  2   [WMMC]  std::__1::map<unsigned int, std::__1::array<WCDB::HandlePool::ReferencedHandle, (unsigned long)10>, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, std::__1::array<WCDB::HandlePool::ReferencedHandle, (unsigned long)10> > > >::find(unsigned int const&) (in WMMC) [inlined] map:1380
  3   [WMMC]  WCDB::ThreadLocal<std::__1::array<WCDB::HandlePool::ReferencedHandle, (unsigned long)10> >::getOrCreate() (in WMMC) ThreadLocal.hpp:74
  4   [WMMC]  WCDB::HandlePool::flowBack(WCDB::HandleType, std::__1::shared_ptr<WCDB::InnerHandle> const&) (in WMMC) HandlePool.cpp:265
  5   [WMMC]  std::__1::__function::__value_func<void (std::__1::shared_ptr<WCDB::InnerHandle>&)>::operator()(std::__1::shared_ptr<WCDB::InnerHandle>&) const (in WMMC) [inlined] functional:1885
  6   [WMMC]  std::__1::function<void (std::__1::shared_ptr<WCDB::InnerHandle>&)>::operator()(std::__1::shared_ptr<WCDB::InnerHandle>&) const (in WMMC) [inlined] functional:2560
  7   [WMMC]  WCDB::Recyclable<std::__1::shared_ptr<WCDB::InnerHandle> >::onUnreferenced() (in WMMC) Recyclable.hpp:124
  8   [WMMC]  WCDB::Recyclable<std::__1::shared_ptr<WCDB::InnerHandle> >::~Recyclable() (in WMMC) Recyclable.hpp:113
  9   [WMMC]  std::__1::pair<unsigned int const, WCDB::RecyclableHandle>::~pair() (in WMMC) [inlined] utility:297
  10  [WMMC]  std::__1::pair<unsigned int const, WCDB::RecyclableHandle>::~pair() (in WMMC) [inlined] utility:297
  11  [WMMC]  std::__1::allocator_traits<std::__1::allocator<std::__1::__tree_node<std::__1::__value_type<unsigned int, WCDB::RecyclableHandle>, void*> > >::destroy<std::__1::pair<unsigned int const, WCDB::RecyclableHandle>, void, void>(std::__1::allocator<std::__1::__tree_node<std::__1::__value_type<unsigned int, WCDB::RecyclableHandle>, void*> >&, std::__1::pair<unsigned int const, WCDB::RecyclableHandle>*) (in WMMC) [inlined] allocator_traits.h:317
  12  [WMMC]  std::__1::__tree<std::__1::__value_type<unsigned int, WCDB::RecyclableHandle>, std::__1::__map_value_compare<unsigned int, std::__1::__value_type<unsigned int, WCDB::RecyclableHandle>, std::__1::less<unsigned int>, true>, std::__1::allocator<std::__1::__value_type<unsigned int, WCDB::RecyclableHandle> > >::destroy(std::__1::__tree_node<std::__1::__value_type<unsigned int, WCDB::RecyclableHandle>, void*>*) (in WMMC) __tree:1801
  13  [WMMC]  std::__1::__tree<std::__1::__value_type<unsigned int, WCDB::RecyclableHandle>, std::__1::__map_value_compare<unsigned int, std::__1::__value_type<unsigned int, WCDB::RecyclableHandle>, std::__1::less<unsigned int>, true>, std::__1::allocator<std::__1::__value_type<unsigned int, WCDB::RecyclableHandle> > >::~__tree() (in WMMC) [inlined] __tree:1789
  14  [WMMC]  std::__1::__tree<std::__1::__value_type<unsigned int, WCDB::RecyclableHandle>, std::__1::__map_value_compare<unsigned int, std::__1::__value_type<unsigned int, WCDB::RecyclableHandle>, std::__1::less<unsigned int>, true>, std::__1::allocator<std::__1::__value_type<unsigned int, WCDB::RecyclableHandle> > >::~__tree() (in WMMC) [inlined] __tree:1786
  15  [WMMC]  std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > >::~map() (in WMMC) [inlined] map:1092
  16  [WMMC]  std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > >::~map() (in WMMC) [inlined] map:1090
  17  [WMMC]  std::__1::default_delete<std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > > >::operator()(std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > >*) const (in WMMC) [inlined] memory:1428
  18  [WMMC]  std::__1::unique_ptr<std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > >, std::__1::default_delete<std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > > > >::reset(std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > >*) (in WMMC) [inlined] memory:1689
  19  [WMMC]  std::__1::unique_ptr<std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > >, std::__1::default_delete<std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > > > >::~unique_ptr() (in WMMC) [inlined] memory:1643
  20  [WMMC]  std::__1::unique_ptr<std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > >, std::__1::default_delete<std::__1::map<unsigned int, WCDB::RecyclableHandle, std::__1::less<unsigned int>, std::__1::allocator<std::__1::pair<unsigned int const, WCDB::RecyclableHandle> > > > >::~unique_ptr() (in WMMC) memory:1643
  21  [dyld]  invocation function for block in dyld4::RuntimeState::_finalizeListTLV(void*) (in dyld) +52
  27  [libsystem_pthread.dylib] _start_wqthread (in libsystem_pthread.dylib) +4```

[Qiuwen-chen]

The crash rate of it is pretty small in our application, I don't want to analyze it in short term.