This is a very strange issue and just does not make sense.
Certain rigged dae files that have in the past allowed display of skin weights in the upload preview and uploaded without problems are now crashing all viewers with mesh upload ability, on all regions when skin weights is ticked. Even older viewer builds from over a year ago are crashing.

Reproduced by multiple people on multiple viewers on different regions.

Steps to Reproduce.

• Download the attached crash.dae to computer.

• Go to Build -> Upload -> Model -> Choose crash.dae -> Open

• In model preview floater, tick "Skin Weights"
  

  Observed Behaviour

• Viewer crashes to desktop.

• Crash reports sent in from avatar Kippy Adored.

• Logs attached - Kippy_logs.zip

  Callstack:

  Operating system: Windows NT
                    6.0.6002 Service Pack 2
  CPU: x86
       GenuineIntel family 6 model 23 stepping 10
       4 CPUs
  
  Crash reason:  EXCEPTION_ACCESS_VIOLATION_READ
  Crash address: 0x86f4477
  
  Thread 0 (crashed)
   0  SecondLifeViewer.exe!std::char_traits<char>::compare(char const *,char const *,unsigned int) [iosfwd : 486 + 0x12]
  
   1  SecondLifeViewer.exe!std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,LLImportMaterial,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,LLImportMaterial> >,0> >::_Lbound(std::basic_string<char,std::char_traits<char>,std::allocator<char> > const &) [xtree : 1746 + 0x2c]
  
   2  SecondLifeViewer.exe!std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,LLImportMaterial,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,LLImportMaterial> > >::operator[](std::basic_string<char,std::char_traits<char>,std::allocator<char> > const &) [map : 211 + 0x7]
  
   3  SecondLifeViewer.exe!LLModelPreview::render() [llfloatermodelpreview.cpp : 5570 + 0xb]
  
   4  SecondLifeViewer.exe!boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal2_impl<bool,LLControlVariable *,LLSD const &,boost_boolean_combiner,int,std::less<int>,boost::function<bool >,boost::function<bool >,boost::signals2::mutex>::slot_invoker,std::_List_iterator<std::_List_val<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group,boost::optional<int> >,boost::signals2::slot2<bool,LLControlVariable *,LLSD const &,boost::function<bool > >,boost::signals2::mutex> >,std::allocator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group,boost::optional<int> >,boost::signals2::slot2<bool,LLControlVariable *,LLSD const &,boost::function<bool > >,boost::signals2::mutex> > > > >,boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group,boost::optional<int> >,boost::signals2::slot2<bool,LLControlVariable *,LLSD const &,boost::function<bool > >,boost::signals2::mutex> >::lock_next_callable() [slot_call_iterator.hpp : 136 + 0x17]
  
   5  SecondLifeViewer.exe!LLViewerDynamicTexture::updateAllInstances() [lldynamictexture.cpp : 245 + 0xa]
  
   6  SecondLifeViewer.exe!display(int,float,int,int) [llviewerdisplay.cpp : 588 + 0x4]
  
   7  SecondLifeViewer.exe!LLAppViewer::mainLoop() [llappviewer.cpp : 1432 + 0x20]
  
   8  SecondLifeViewer.exe!WinMain [llappviewerwin32.cpp : 297 + 0x8]
  
   9  SecondLifeViewer.exe!__tmainCRTStartup [crtexe.c : 547 + 0x1b]
  
  10  kernel32.dll + 0x4d2e8
  
  11  ntdll.dll + 0x41602
  
  12  ntdll.dll + 0x415d5

  Expected behaviour

  No crash.

  Other Information

  Note that if skin weights is ticked in the upload options tab, the dae will upload successfully.
  It is only ticking skin weights in the preview options that crash the viewer.

  This one has me scratching my head....

Attachments

• billys_dog7.dae 2014-03-09 14:52:18
• BUG-5335.diff 2015-02-17 18:27:44
• Callstack_WTF.txt 2014-03-09 11:19:14
• crash.dae 2014-03-09 10:58:28
• Kippy_logs.zip 2014-03-09 10:56:36

{
  'Business Unit': ['Platform'],
  'Date of First Response': '2015-02-17T17:27:44.847-0600',
  'System': 'SL Viewer',
  'Target Viewer Version': 'viewer-development',
  'What just happened?': '.',
  'What were you doing when it happened?': 'Filling in.....',
  'What were you expecting to happen instead?': '.',
  'Where': 'Anywhere, Any viewer.',
}