The following bit of code in function TComDataCU::getBaseColCU does not handle negative values properly.

  Int iBX = (((uiPelX - leftStartL)*g_posScalingFactor[refLayerIdc][0] + (1<<15)) >> 16) + windowRL.getWindowLeftOffset();
  Int iBY = (((uiPelY - topStartL )*g_posScalingFactor[refLayerIdc][1] + (1<<15)) >> 16) + windowRL.getWindowTopOffset();

The unsigned variables, uiPelX and uiPelY, need to be cast to signed variables as follows.

  Int iBX = ((((Int)uiPelX - leftStartL)*g_posScalingFactor[refLayerIdc][0] + (1<<15)) >> 16) + windowRL.getWindowLeftOffset();
  Int iBY = ((((Int)uiPelY - topStartL )*g_posScalingFactor[refLayerIdc][1] + (1<<15)) >> 16) + windowRL.getWindowTopOffset();