Uninitialized variables in juce_RenderingHelpers

I have a student who is reporting a ton of warnings in juce_RenderingHelper.h in Visual Studio 2019

here is near line 1396:

        TransformedImageSpanInterpolator interpolator;
        const Image::BitmapData& destData;
        const Image::BitmapData& srcData;
        const int extraAlpha;
        const Graphics::ResamplingQuality quality;
        const int maxX, maxY;
        int currentY;
        DestPixelType* linePixels;
        HeapBlock<SrcPixelType> scratchBuffer;
        size_t scratchSize = 2048;