[4.5 Urgent] Cant upgrade Solus, Making an FCanvas for Render Texture Crashes 4.5, Same Code works great in 4.4

Development Asset Creation
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Hi ,

Thank you for providing the exact code to reproduce this issue.

I was able to reproduce the crash related to CanvasRenderTarget2D and have submitted a report for further investigation of that issue (UE-4570). However, I still have not been able to reproduce the crash using TextureRenderTarget2D. Using the code below, I was able to load the project normally.

// .h

UCLASS()
class TESTSOLUS_API AMyStaticMeshActor : public AStaticMeshActor
{
	GENERATED_UCLASS_BODY()

	UPROPERTY()
	UTextureRenderTarget2D* RenderTex;

	FCanvas* Canvas;
};

// .cpp
AMyStaticMeshActor::AMyStaticMeshActor(const class FPostConstructInitializeProperties& PCIP)
	: Super(PCIP)
{
	FVector2D Dimensions(512, 512);

	RenderTex = CastChecked<UTextureRenderTarget2D>(StaticConstructObject(UTextureRenderTarget2D::StaticClass()));
	RenderTex->AddToRoot();
	RenderTex->ClearColor = FLinearColor(0, 0, 0, 1);
	RenderTex->bNeedsTwoCopies = false;
	RenderTex->bHDR = false;

	RenderTex->InitCustomFormat(Dimensions.X, Dimensions.Y, EPixelFormat::PF_A16B16G16R16, true);
	RenderTex->UpdateResourceImmediate();

	Canvas = NULL;
	//Canvas = new FCanvas((FTextureRenderTarget2DResource*)RenderTex->Resource, NULL, 0, 0, 0);  // Works in 4.4.3, not in 4.5
	Canvas = new FCanvas((FTextureRenderTarget2DResource*)RenderTex->Resource, NULL, GetWorld(), ERHIFeatureLevel::SM4);
	Canvas->Clear(RenderTex->ClearColor);
}

Unless I am missing something, that should be identical to the code you provided to reproduce this crash. Do you see any differences between what you have in your project and what I have here?