Crash in Transformation Filter
The Transform filter will crash if some of the data arrays in the data set are vtkStringArray type.
I could check in the debugger that it happened at vtkTransformFilter.cxx line 326: The function vtkCellData::GetArray(int) (and similarly also vtkPointData::GetArray(int) at line 319 which did not occur in my example) only returns a vtkDataArray instead of a vtkAbstractArray.
Using the GetAbstractArray(int) function instead should solve the problem.