In the code for WarpBlt>>warpBitsSmoothing:sourceMap:, there appears to be a small error in the Smalltalk code that runs if the primitive fails. The code that reads:

		sp _ (self startFrom: pA x to: pB x offset: nSteps*deltaPAB x)
			@ (self startFrom: pA y to: pB y offset: nSteps*deltaPAB x).

should read

		sp _ (self startFrom: pA x to: pB x offset: nSteps*deltaPAB x)
			@ (self startFrom: pA y to: pB y offset: nSteps*deltaPAB y).

The actual primitive code appears correct in this regard.

Cheers,
Bob