src/share/classes/com/sun/imageio/plugins/gif/GIFImageReader.java

*** 772,791 ****
          System.arraycopy(src, offset, dst, 0, len);
          return offset + len;
      }
  
      private void startPass(int pass) {
!         if (updateListeners == null) {
              return;
          }
  
!         int y = 0;
!         int yStep = 1;
!         if (imageMetadata.interlaceFlag) {
!             y = interlaceOffset[interlacePass];
!             yStep = interlaceIncrement[interlacePass];
!         }
  
          int[] vals = ReaderUtil.
              computeUpdatedPixels(sourceRegion,
                                   destinationOffset,
                                   destinationRegion.x,
--- 772,787 ----
          System.arraycopy(src, offset, dst, 0, len);
          return offset + len;
      }
  
      private void startPass(int pass) {
!         if (updateListeners == null || !imageMetadata.interlaceFlag) {
              return;
          }
  
!         int y = interlaceOffset[interlacePass];
!         int yStep = interlaceIncrement[interlacePass];
  
          int[] vals = ReaderUtil.
              computeUpdatedPixels(sourceRegion,
                                   destinationOffset,
                                   destinationRegion.x,