Intermittent crash in Multiplayer Sample

[mbalfour-amzn]

When running the MultiplayerSample GameLauncher client in the development branch, I get intermittent crashes with the following callstack:

>	PopcornFX.dll!PopcornFX::_ExpandAndInterpolatePayload_0x0C_f32x3(const void * srcPtrA, const void * srcPtrB, const void * srcPtrAd, const void * srcPtrBd, const PopcornFX::TMemoryView<unsigned int const> & cacheParentId, const PopcornFX::TMemoryView<float const> & cacheCursors, void * curPayloadPtr, unsigned int count, const PopcornFX::SPayloadElementView::ELerpSemantic payloadLerpSemantic) Line 696	C++
 	PopcornFX.dll!PopcornFX::CParticleTask_KickEvent::_VirtualLaunch(PopcornFX::Threads::SThreadContext & threadContext) Line 1441	C++
 	PopcornFX.dll!PopcornFX::CAsynchronousJob::_LaunchReady(PopcornFX::Threads::SThreadContext & threadContext) Line 232	C++
 	PopcornFX.dll!PopcornFX::CWorkerThread::Run() Line 123	C++
 	PopcornFX.dll!PopcornFX::CThread::ThreadStartAddress(void * param) Line 643	C++

The specific crash in this example is: Exception thrown at 0x00007FFB383355D8 (PopcornFX.dll) in MultiplayerSample.GameLauncher.exe: 0xC0000005: Access violation reading location 0x000001C45345C740.

Here are all of the local variables available in VS at the point of the crash:

<title>Document</title>

	Name	Value	Type
◢	cacheCursors	{m_Data=0x000000a71e7ff410 "\x14\x1" m_Count=0x0000007c }	const PopcornFX::TMemoryView &
	▶ m_Data	0x000000a71e7ff410 "\x14\x1"	const unsigned char *
	m_Count	0x0000007c	unsigned int
◢	cacheParentId	{m_Data=0x000000a71e7ff610 "0ü�\x1e§" m_Count=0x0000007c }	const PopcornFX::TMemoryView &
	▶ m_Data	0x000000a71e7ff610 "0ü�\x1e§"	const unsigned char *
	m_Count	0x0000007c	unsigned int
	count	0x0000000c	unsigned int
	curPayloadPtr	0x000001c30eb63840	void *
	f	Variable is optimized away and not available.
	payloadLerpSemantic	LerpSemantic_Linear (0x00000001)	PopcornFX::SPayloadElementView::ELerpSemantic
	srcPtrA	0x000001c2e545f440	const void *
	srcPtrAd	Variable is optimized away and not available.
	srcPtrB	0x000001c2e545f500	const void *
	srcPtrBd	Variable is optimized away and not available.

There are several asserts in _VirtualLaunch when running with a debug build, it's possible this crash is related to those asserts.