Segfault in debug builds with **Extract AMR Blocks**
Steps (5.3.0-RC1-30-g78390a72)
- start paraview
- create Hierarchical Fractal source, apply
- create Extract AMR Blocks
In debug builds, it fails with the following:
ASSERT failure in QList::operator[]: "index out of range", file /home/utkarsh/Software/qt/5.7.1/install/include/QtCore/qlist.h, line 541 (global/qglobal.cpp:3089, void qt_assert_x(const char*, const char*, const char*, int))