=== 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: ./Castro1d.gnu.TEST.MPI.ex() [0x52b4e9]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:105

 1: ./Castro1d.gnu.TEST.MPI.ex() [0x52cb1e]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:52

 2: /lib64/libc.so.6(+0x346e0) [0x7f02592356e0]
    ??
    ??:0

 3: ./Castro1d.gnu.TEST.MPI.ex() [0x6899bf]
    __amrex_filcc_module_MOD_amrex_filccn
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_filcc_mod.F90:161

 4: ./Castro1d.gnu.TEST.MPI.ex() [0x6f1e00]
    __bc_fill_module_MOD_hypfill
    /raid/testing/castro-gfortran/Castro//Source/problems/bc_fill_1d.F90:43

 5: ./Castro1d.gnu.TEST.MPI.ex() [0x56a24c]
    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

 6: ./Castro1d.gnu.TEST.MPI.ex() [0x5683bf]
    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)

 7: ./Castro1d.gnu.TEST.MPI.ex() [0x568538]
    amrex::StateDataPhysBCFunct::FillBoundary(amrex::MultiFab&, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_StateData.cpp:843

 8: ./Castro1d.gnu.TEST.MPI.ex() [0x531d6e]
    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

 9: ./Castro1d.gnu.TEST.MPI.ex() [0x5582f8]
    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

10: ./Castro1d.gnu.TEST.MPI.ex() [0x55fd3a]
    amrex::FillPatchIterator::Initialize(int, double, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:946

11: ./Castro1d.gnu.TEST.MPI.ex() [0x560483]
    amrex::FillPatchIterator::FillPatchIterator(amrex::AmrLevel&, amrex::MultiFab&, int, double, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:653

12: ./Castro1d.gnu.TEST.MPI.ex() [0x5604f5]
    amrex::AmrLevel::FillPatch(amrex::AmrLevel&, amrex::MultiFab&, int, double, int, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:2099

13: ./Castro1d.gnu.TEST.MPI.ex() [0x419008]
    Castro::initData()
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:934

14: ./Castro1d.gnu.TEST.MPI.ex() [0x54a10a]
    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

15: ./Castro1d.gnu.TEST.MPI.ex() [0x54c492]
    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

16: ./Castro1d.gnu.TEST.MPI.ex() [0x54fff3]
    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

17: ./Castro1d.gnu.TEST.MPI.ex() [0x555013]
    amrex::Amr::init(double, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1106

18: ./Castro1d.gnu.TEST.MPI.ex() [0x40a922]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:120

19: /lib64/libc.so.6(__libc_start_main+0xea) [0x7f0259221f2a]
    ??
    ??:0

20: ./Castro1d.gnu.TEST.MPI.ex() [0x40fb0a]
    _start
    ??:?