Crash occurs with PlatformMediaSource called in infinite loop

The editor crashes when the user attempts to reopen the Platform asset after setting the media file to the Windows platform. The editor also crashes when opening another asset (adding in a Media Player and opening that).

The crash is occurring from an infinite loop calling the platform media source.

This crash does not occur in //UE4/Release-4.15 @ CL 8259876.

Setup:
Create a new Blank project with no Starter Content

Repro:

1. Create a new Platform Media Source
2. Assign a media file to the Windows platform
3. Close the Platform Media Source
4. Reopen the Platform Media Source asset

Expected Result: Able to assign the media file to the Windows platform and reopen the asset
Actual Result: The editor crashes when trying to reopen the asset or open another asset after assigning the media file to the Windows platform.

UE4Editor_Core!rml::internal::ExtMemoryPool::initTLS()
UE4Editor_Core!scalable_realloc()
UE4Editor_Core!FMallocTBB::Realloc() malloctbb.cpp:88
UE4Editor_MediaAssets!TArray<wchar_t,FDefaultAllocator>::ResizeGrow() array.h:2249
UE4Editor_MediaAssets!UPlatformMediaSource::GetMediaSource() platformmediasource.cpp:81
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17
UE4Editor_MediaAssets!UPlatformMediaSource::GetUrl() platformmediasource.cpp:17