=== If no file names and line numbers are shown below, one can run
            addr2line -Cfie my_exefile my_line_address
    to convert `my_line_address` (e.g., 0x4a6b) into file name and line number.

=== Please note that the line number reported by addr2line may not be accurate.
    One can use
            readelf -wl my_exefile | grep my_line_address'
    to find out the offset for that line.

 0: ./Castro2d.gnu.TEST.MPI.ex() [0x5473a9]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:105

 1: ./Castro2d.gnu.TEST.MPI.ex() [0x5489de]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:52

 2: /lib64/libc.so.6(+0x346e0) [0x7faded1206e0]
    ??
    ??:0

 3: ./Castro2d.gnu.TEST.MPI.ex() [0x6ca938]
    __amrex_filcc_module_MOD_amrex_filccn
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_filcc_mod.F90:200

 4: ./Castro2d.gnu.TEST.MPI.ex() [0x762ca0]
    __bc_fill_module_MOD_hypfill
    /raid/testing/castro-gfortran/Castro//Source/problems/bc_fill_2d.F90:49

 5: ./Castro2d.gnu.TEST.MPI.ex() [0x762d16]
    ca_hypfill
    /raid/testing/castro-gfortran/Castro//Source/problems/bc_fill_2d.F90:81

 6: ./Castro2d.gnu.TEST.MPI.ex() [0x58b7fa]
    amrex::StateDescriptor::BndryFunc::operator()(double*, int const*, int const*, int const*, int const*, double const*, double const*, double const*, int const*, int) const
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_StateDescriptor.cpp:122

 7: ./Castro2d.gnu.TEST.MPI.ex() [0x588d78]
    amrex::StateData::FillBoundary(amrex::FArrayBox&, double, double const*, amrex::RealBox const&, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_StateData.cpp:504 (discriminator 1)

 8: ./Castro2d.gnu.TEST.MPI.ex() [0x589132]
    amrex::StateDataPhysBCFunct::FillBoundary(amrex::MultiFab&, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_StateData.cpp:845

 9: ./Castro2d.gnu.TEST.MPI.ex() [0x54eca9]
    amrex::FillPatchSingleLevel(amrex::MultiFab&, double, amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> > const&, amrex::Vector<double, std::allocator<double> > const&, int, int, int, amrex::Geometry const&, amrex::PhysBCFunctBase&)
    /raid/testing/castro-gfortran/AMReX//Src/AmrCore/AMReX_FillPatchUtil.cpp:116

10: ./Castro2d.gnu.TEST.MPI.ex() [0x57897d]
    std::vector<double, std::allocator<double> >::~vector()
    /usr/include/c++/7/bits/stl_vector.h:434
    amrex::Vector<double, std::allocator<double> >::~Vector()
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_Vector.H:18
    amrex::FillPatchIterator::FillFromLevel0(double, int, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:1032

11: ./Castro2d.gnu.TEST.MPI.ex() [0x5806f2]
    amrex::FillPatchIterator::Initialize(int, double, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:946

12: ./Castro2d.gnu.TEST.MPI.ex() [0x580e63]
    amrex::FillPatchIterator::FillPatchIterator(amrex::AmrLevel&, amrex::MultiFab&, int, double, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:653

13: ./Castro2d.gnu.TEST.MPI.ex() [0x580ed5]
    amrex::AmrLevel::FillPatch(amrex::AmrLevel&, amrex::MultiFab&, int, double, int, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:2099

14: ./Castro2d.gnu.TEST.MPI.ex() [0x4195a0]
    Castro::initData()
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:934

15: ./Castro2d.gnu.TEST.MPI.ex() [0x56a438]
    amrex::Amr::defBaseLevel(double, amrex::BoxArray const*, amrex::Vector<int, std::allocator<int> > const*)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2279

16: ./Castro2d.gnu.TEST.MPI.ex() [0x56c9d2]
    amrex::Amr::InitializeInit(double, double, amrex::BoxArray const*, amrex::Vector<int, std::allocator<int> > const*)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1257

17: ./Castro2d.gnu.TEST.MPI.ex() [0x570ce3]
    amrex::Amr::initialInit(double, double, amrex::BoxArray const*, amrex::Vector<int, std::allocator<int> > const*)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1226

18: ./Castro2d.gnu.TEST.MPI.ex() [0x575893]
    amrex::Amr::init(double, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1106

19: ./Castro2d.gnu.TEST.MPI.ex() [0x40aa42]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:120

20: /lib64/libc.so.6(__libc_start_main+0xea) [0x7faded10cf2a]
    ??
    ??:0

21: ./Castro2d.gnu.TEST.MPI.ex() [0x40fc3a]
    _start
    ??:?