Exception thrown: read access violation.
**mesh_src** was nullptr.

blender.exe!deformVertsEM(ModifierData * md=0x000002ebb119bdb8, const ModifierEvalContext * ctx=0x000000f1173fbd88, BMEditMesh * editData=0x000002ebaf309f68, Mesh * mesh=0x000002ebc0d01288, float[3] * vertexCos=0x000002ebcaffb068, int numVerts=1538) Line 515
	at C:\blender-git\blender\source\blender\modifiers\intern\MOD_cast.c(515)
blender.exe!BKE_modifier_deform_vertsEM(ModifierData * md=0x000002ebb119bdb8, const ModifierEvalContext * ctx=0x000000f1173fbd88, BMEditMesh * em=0x000002ebaf309f68, Mesh * me=0x000002ebc0d01288, float[3] * vertexCos=0x000002ebcaffb068, int numVerts=1538) Line 1054
	at C:\blender-git\blender\source\blender\blenkernel\intern\modifier.c(1054)
blender.exe!editbmesh_calc_modifiers(Depsgraph * depsgraph=0x000002eba69167d8, Scene * scene=0x000002eba6c4e658, Object * ob=0x000002eba6c4ffc8, BMEditMesh * em_input=0x000002ebaf309f68, const CustomData_MeshMasks * dataMask=0x000000f1173fc848, Mesh * * r_cage=0x000000f1173fc6d8, Mesh * * r_final=0x000000f1173fc6f8) Line 1569
	at C:\blender-git\blender\source\blender\blenkernel\intern\DerivedMesh.c(1569)
blender.exe!editbmesh_build_data(Depsgraph * depsgraph=0x000002eba69167d8, Scene * scene=0x000002eba6c4e658, Object * obedit=0x000002eba6c4ffc8, BMEditMesh * em=0x000002ebaf309f68, CustomData_MeshMasks * dataMask=0x000000f1173fc848) Line 1852
	at C:\blender-git\blender\source\blender\blenkernel\intern\DerivedMesh.c(1852)
blender.exe!makeDerivedMesh(Depsgraph * depsgraph=0x000002eba69167d8, Scene * scene=0x000002eba6c4e658, Object * ob=0x000002eba6c4ffc8, BMEditMesh * em=0x000002ebaf309f68, const CustomData_MeshMasks * dataMask=0x000000f1173fc9b8) Line 1923
	at C:\blender-git\blender\source\blender\blenkernel\intern\DerivedMesh.c(1923)
blender.exe!BKE_object_handle_data_update(Depsgraph * depsgraph=0x000002eba69167d8, Scene * scene=0x000002eba6c4e658, Object * ob=0x000002eba6c4ffc8) Line 190
	at C:\blender-git\blender\source\blender\blenkernel\intern\object_update.c(190)
blender.exe!BKE_object_eval_uber_data(Depsgraph * depsgraph=0x000002eba69167d8, Scene * scene=0x000002eba6c4e658, Object * ob=0x000002eba6c4ffc8) Line 385
	at C:\blender-git\blender\source\blender\blenkernel\intern\object_update.c(385)
blender.exe!std::invoke<void (__cdecl*&)(Depsgraph *,Scene *,Object *),Depsgraph *,Scene * &,Object * &>(void(*)(Depsgraph *, Scene *, Object *) & _Obj=0x00007ff75944a239, Depsgraph * && _Arg1=0x000002eba69167d8, Scene * & <_Args2_0>=0x000002eba6c4e658, Object * & <_Args2_1>=0x000002eba6c4ffc8) Line 1607
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits(1607)
blender.exe!std::_Invoker_ret<std::_Unforced,0>::_Call<void (__cdecl*&)(Depsgraph *,Scene *,Object *),Depsgraph *,Scene * &,Object * &>(void(*)(Depsgraph *, Scene *, Object *) & <_Vals_0>=0x00007ff75944a239, Depsgraph * && <_Vals_1>=0x000002eba69167d8, Scene * & <_Vals_2>=0x000002eba6c4e658, Object * & <_Vals_3>=0x000002eba6c4ffc8) Line 1658
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits(1658)
blender.exe!std::_Call_binder<std::_Unforced,0,1,2,void (__cdecl*)(Depsgraph *,Scene *,Object *),std::tuple<std::_Ph<1>,Scene *,Object *>,std::tuple<Depsgraph * &&>>(std::_Invoker_ret<std::_Unforced,0> __formal={...}, std::integer_sequence<unsigned __int64,0,1,2> __formal={...}, void(*)(Depsgraph *, Scene *, Object *) & _Obj=0x00007ff75944a239, std::tuple<std::_Ph<1>,Scene *,Object *> & _Tpl={...}, std::tuple<Depsgraph * &&> && _Ut={...}) Line 1388
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\functional(1388)
blender.exe!std::_Binder<std::_Unforced,void (__cdecl&)(Depsgraph *,Scene *,Object *),std::_Ph<1> const &,Scene * &,Object * &>::operator()<Depsgraph *>(Depsgraph * && <_Unbargs_0>=0x000002eba69167d8) Line 1427
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\functional(1427)
blender.exe!std::invoke<std::_Binder<std::_Unforced,void (__cdecl&)(Depsgraph *,Scene *,Object *),std::_Ph<1> const &,Scene * &,Object * &> &,Depsgraph *>(std::_Binder<std::_Unforced,void (__cdecl&)(Depsgraph *,Scene *,Object *),std::_Ph<1> const &,Scene * &,Object * &> & _Obj={...}, Depsgraph * && _Arg1=0x000002eba69167d8) Line 1626
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits(1626)
blender.exe!std::_Invoker_ret<void,1>::_Call<std::_Binder<std::_Unforced,void (__cdecl&)(Depsgraph *,Scene *,Object *),std::_Ph<1> const &,Scene * &,Object * &> &,Depsgraph *>(std::_Binder<std::_Unforced,void (__cdecl&)(Depsgraph *,Scene *,Object *),std::_Ph<1> const &,Scene * &,Object * &> & <_Vals_0>={...}, Depsgraph * && <_Vals_1>=0x000002eba69167d8) Line 1641
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\type_traits(1641)
blender.exe!std::_Func_impl_no_alloc<std::_Binder<std::_Unforced,void (__cdecl&)(Depsgraph *,Scene *,Object *),std::_Ph<1> const &,Scene * &,Object * &>,void,Depsgraph *>::_Do_call(Depsgraph * && <_Args_0>=0x000002eba69167d8) Line 904
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\functional(904)
blender.exe!std::_Func_class<void,Depsgraph *>::operator()(Depsgraph * <_Args_0>=0x000002eba69167d8) Line 952
	at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include\functional(952)
blender.exe!blender::deg::`anonymous namespace'::evaluate_node(const blender::deg::`anonymous-namespace'::DepsgraphEvalState * state=0x000000f1173fe528, blender::deg::OperationNode * operation_node=0x000002ebc11a9998) Line 116
	at C:\blender-git\blender\source\blender\depsgraph\intern\eval\deg_eval.cc(116)
blender.exe!blender::deg::`anonymous namespace'::deg_task_run_func(TaskPool * pool=0x000002ebb155dc58, void * taskdata=0x000002ebc11a9998) Line 128
	at C:\blender-git\blender\source\blender\depsgraph\intern\eval\deg_eval.cc(128)
blender.exe!Task::()::__l2::<lambda>() Line 118
	at C:\blender-git\blender\source\blender\blenlib\intern\task_pool.cc(118)
blender.exe!tbb::interface7::internal::delegated_function<void <lambda>(void) const ,void>::operator()() Line 94
	at C:\blender-git\lib\win64_vc15\tbb\include\tbb\task_arena.h(94)
tbb_debug.dll!00007ffb5640cd44()
blender.exe!tbb::interface7::internal::isolate_impl<void,void <lambda>(void) const>(const Task::()::__l2::void <lambda>(void) & f=void <lambda>(void){...}) Line 161
	at C:\blender-git\lib\win64_vc15\tbb\include\tbb\task_arena.h(161)
blender.exe!tbb::interface7::this_task_arena::isolate<void <lambda>(void)>(const Task::()::__l2::void <lambda>(void) & f=void <lambda>(void){...}) Line 396
	at C:\blender-git\lib\win64_vc15\tbb\include\tbb\task_arena.h(396)
blender.exe!Task::operator()() Line 122
	at C:\blender-git\blender\source\blender\blenlib\intern\task_pool.cc(122)
blender.exe!tbb::internal::function_task<Task>::execute() Line 1049
	at C:\blender-git\lib\win64_vc15\tbb\include\tbb\task.h(1049)
tbb_debug.dll!00007ffb5642d21a()
tbb_debug.dll!00007ffb5642aff3()
blender.exe!tbb::task::wait_for_all() Line 810
	at C:\blender-git\lib\win64_vc15\tbb\include\tbb\task.h(810)
blender.exe!tbb::internal::task_group_base::wait() Line 168
	at C:\blender-git\lib\win64_vc15\tbb\include\tbb\task_group.h(168)
blender.exe!tbb_task_pool_work_and_wait(TaskPool * pool=0x000002ebb155dc58) Line 253
	at C:\blender-git\blender\source\blender\blenlib\intern\task_pool.cc(253)
blender.exe!BLI_task_pool_work_and_wait(TaskPool * pool=0x000002ebb155dc58) Line 500
	at C:\blender-git\blender\source\blender\blenlib\intern\task_pool.cc(500)
blender.exe!blender::deg::deg_evaluate_on_refresh(blender::deg::Depsgraph * graph=0x000002eba69167d8) Line 399
	at C:\blender-git\blender\source\blender\depsgraph\intern\eval\deg_eval.cc(399)
blender.exe!deg_flush_updates_and_refresh(blender::deg::Depsgraph * deg_graph=0x000002eba69167d8) Line 59
	at C:\blender-git\blender\source\blender\depsgraph\intern\depsgraph_eval.cc(59)
blender.exe!DEG_evaluate_on_refresh(Depsgraph * graph=0x000002eba69167d8) Line 74
	at C:\blender-git\blender\source\blender\depsgraph\intern\depsgraph_eval.cc(74)
blender.exe!scene_graph_update_tagged(Depsgraph * depsgraph=0x000002eba69167d8, Main * bmain=0x000002eba4b492b8, bool only_if_tagged=false) Line 2592
	at C:\blender-git\blender\source\blender\blenkernel\intern\scene.c(2592)
blender.exe!BKE_scene_graph_update_tagged(Depsgraph * depsgraph=0x000002eba69167d8, Main * bmain=0x000002eba4b492b8) Line 2630
	at C:\blender-git\blender\source\blender\blenkernel\intern\scene.c(2630)
blender.exe!wm_event_do_depsgraph(bContext * C=0x000002eba3fb61b8, bool is_after_open_file=false) Line 357
	at C:\blender-git\blender\source\blender\windowmanager\intern\wm_event_system.c(357)
blender.exe!wm_event_do_refresh_wm_and_depsgraph(bContext * C=0x000002eba3fb61b8) Line 384
	at C:\blender-git\blender\source\blender\windowmanager\intern\wm_event_system.c(384)
blender.exe!wm_event_do_notifiers(bContext * C=0x000002eba3fb61b8) Line 562
	at C:\blender-git\blender\source\blender\windowmanager\intern\wm_event_system.c(562)
blender.exe!WM_main(bContext * C=0x000002eba3fb61b8) Line 641
	at C:\blender-git\blender\source\blender\windowmanager\intern\wm.c(641)
blender.exe!main(int argc=1, const unsigned char * * UNUSED_argv_c=0x000002eba0a20be0) Line 526
	at C:\blender-git\blender\source\creator\creator.c(526)
blender.exe!invoke_main() Line 79
	at D:\agent\_work\9\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl(79)
blender.exe!__scrt_common_main_seh() Line 288
	at D:\agent\_work\9\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl(288)
blender.exe!__scrt_common_main() Line 331
	at D:\agent\_work\9\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl(331)
blender.exe!mainCRTStartup() Line 17
	at D:\agent\_work\9\s\src\vctools\crt\vcstartup\src\startup\exe_main.cpp(17)
kernel32.dll!BaseThreadInitThunk()
ntdll.dll!RtlUserThreadStart()