Operating system: Windows NT
                  10.0.17134
CPU: amd64
     family 22 model 0 stepping 1
     4 CPUs

Crash reason:  EXCEPTION_ACCESS_VIOLATION_READ
Crash address: 0xffffffffffffffff
Assertion: Unknown assertion type 0x00000000

Thread 0 (crashed)
 0  Firestorm-Releasex64.exe!LLSD::operator[](std::basic_string<char,std::char_traits<char>,std::allocator<char> > const &) [llsd.cpp : 877 + 0x65]
    rbx = 0x0000025de0e73150   r12 = 0x0000000000000000
    r13 = 0x000000cff1afefe0   r14 = 0x000000cff1afefe0
    r15 = 0x0000000000000000   rip = 0x00007ff6e116ac05
    rsp = 0x000000cff1afed38   rbp = 0x0000025de52e7ae0
    Found by: given as instruction pointer in context
 1  0xfffffffffffffffe
    rbx = 0x0000025de0e73150   r12 = 0x0000000000000000
    r13 = 0x000000cff1afefe0   r14 = 0x000000cff1afefe0
    r15 = 0x0000000000000000   rip = 0xfffffffffffffffe
    rsp = 0x000000cff1afed68   rbp = 0x0000025de52e7ae0
    Found by: call frame info
 2  Firestorm-Releasex64.exe!LLMeshCostData::init(LLSD const &) [llmeshrepository.cpp : 4607 + 0x1e]
    rip = 0x00007ff6e03bbf62   rsp = 0x000000cff1afeda0
    rbp = 0x0000025de52e7ae0
    Found by: stack scanning
 3  Firestorm-Releasex64.exe!LLMeshRepository::getCostData(LLSD &,LLMeshCostData &) [llmeshrepository.cpp : 4775 + 0xb]
    rip = 0x00007ff6e03b900c   rsp = 0x000000cff1afee50
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
 4  Firestorm-Releasex64.exe!LLMeshRepository::getCostData(LLUUID,LLMeshCostData &) [llmeshrepository.cpp : 4762 + 0xe]
    rip = 0x00007ff6e03b92d1   rsp = 0x000000cff1afeec0
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
 5  Firestorm-Releasex64.exe!LLMeshRepository::getEstTrianglesMax(LLUUID) [llmeshrepository.cpp : 4387 + 0x1b]
    rip = 0x00007ff6e03b9620   rsp = 0x000000cff1afefc0
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
 6  Firestorm-Releasex64.exe!LLVOVolume::getEstTrianglesMax() [llvovolume.cpp : 4299 + 0x20]
    rip = 0x00007ff6e0a01182   rsp = 0x000000cff1aff060
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
 7  Firestorm-Releasex64.exe!LLViewerObject::recursiveGetEstTrianglesMax() [llviewerobject.cpp : 3845 + 0x11]
    rip = 0x00007ff6e08844fb   rsp = 0x000000cff1aff0a0
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
 8  Firestorm-Releasex64.exe!LLViewerObject::recursiveGetEstTrianglesMax() [llviewerobject.cpp : 3852 + 0x5]
    rip = 0x00007ff6e088451f   rsp = 0x000000cff1aff0e0
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
 9  Firestorm-Releasex64.exe!LLVOAvatar::accountRenderComplexityForObject(LLViewerObject const *,float,std::map<LLUUID,int,std::less<LLUUID>,std::allocator<std::pair<LLUUID const ,int> > > &,unsigned int &,std::list<LLHUDComplexity,std::allocator<LLHUDComplexity> > &,std::map<LLUUID,unsigned int,std::less<LLUUID>,std::allocator<std::pair<LLUUID const ,unsigned int> > > &,std::map<LLUUID,unsigned int,std::less<LLUUID>,std::allocator<std::pair<LLUUID const ,unsigned int> > > &) [llvoavatar.cpp : 10945 + 0x8]
    rip = 0x00007ff6e0953186   rsp = 0x000000cff1aff120
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
10  Firestorm-Releasex64.exe!LLVOAvatar::calculateUpdateRenderComplexity() [llvoavatar.cpp : 11171 + 0x38]
    rip = 0x00007ff6e0958698   rsp = 0x000000cff1aff320
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
11  Firestorm-Releasex64.exe!LLVOAvatar::idleUpdateRenderComplexity() [llvoavatar.cpp : 10841 + 0x8]
    rip = 0x00007ff6e0967cb7   rsp = 0x000000cff1aff510
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
12  Firestorm-Releasex64.exe!LLVOAvatar::idleUpdate(LLAgent &,double const &) [llvoavatar.cpp : 2685 + 0x8]
    rip = 0x00007ff6e096274d   rsp = 0x000000cff1aff640
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
13  Firestorm-Releasex64.exe!LLViewerObjectList::update(LLAgent &) [llviewerobjectlist.cpp : 1063 + 0x10]
    rip = 0x00007ff6e089de73   rsp = 0x000000cff1aff7e0
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
14  Firestorm-Releasex64.exe!LLAppViewer::idle() [llappviewer.cpp : 5688 + 0x13]
    rip = 0x00007ff6dfe25edb   rsp = 0x000000cff1aff8f0
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
15  Firestorm-Releasex64.exe!LLAppViewer::doFrame() [llappviewer.cpp : 1694 + 0x8]
    rip = 0x00007ff6dfe18d46   rsp = 0x000000cff1affa60
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
16  Firestorm-Releasex64.exe!LLAppViewer::frame() [llappviewer.cpp : 1563 + 0x5]
    rip = 0x00007ff6dfe1bcf4   rsp = 0x000000cff1affbe0
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
17  Firestorm-Releasex64.exe!WinMain [llappviewerwin32.cpp : 396 + 0x9]
    rip = 0x00007ff6e0b46fa9   rsp = 0x000000cff1affc80
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
18  Firestorm-Releasex64.exe!__tmainCRTStartup [crtexe.c : 618 + 0x15]
    rip = 0x00007ff6e167d4a5   rsp = 0x000000cff1affd20
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
19  kernel32.dll + 0x13dc4
    rip = 0x00007ffb3b643dc4   rsp = 0x000000cff1affd60
    rbp = 0x0000025de52e7ae0
    Found by: call frame info
20  ntdll.dll + 0x73691
    rip = 0x00007ffb3b9e3691   rsp = 0x000000cff1affd90
    rbp = 0x0000025de52e7ae0
    Found by: stack scanning
21  KERNELBASE.dll + 0xebc40
    rip = 0x00007ffb389dbc40   rsp = 0x000000cff1affdc0
    rbp = 0x0000025de52e7ae0
    Found by: stack scanning