anchor.diff:          } else if (unique) {
             // keep sum within float32 precision
             _sum = doubleToSingle(_sum + weight);
  +          _threshold += 2e-7;
           }
         } else if (joint != 0) {
           context.addIssue(DataError.accessorJointsUsedZeroWeight,
  
positive.code: 
        // joints/weights pair covers a subset of primitive influences
        final jointsIterators = List<Iterator<int>>(primitive.jointsCount);
        final weightsIterators = List<Iterator<num>>(primitive.jointsCount);
        for (var i = 0; i < primitive.jointsCount; i++) {
          final jointsAccessor =
              _guardAccessor(primitive.attributes['${JOINTS_}_$i']);
  
negative.code: 
  class InfluencesChecker {
    final List<Iterator<int>> jointsIterators;
    final List<Iterator<double>> weightsIterators;
    final int maxJointIndex;
    final int limitingSkinIndex;
    final String path;
  