=== 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.DEBUG.MPI.ex() [0x53eb5e]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:104

 1: ./Castro1d.gnu.DEBUG.MPI.ex() [0x53e966]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:52

 2: /lib64/libc.so.6(+0x346e0) [0x7f324053a6e0]
    ??
    ??:0

 3: ./Castro1d.gnu.DEBUG.MPI.ex() [0x69e2a0]
    __amrex_filcc_module_MOD_amrex_filccn
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_filcc_mod.F90:200 (discriminator 32)

 4: ./Castro1d.gnu.DEBUG.MPI.ex() [0x8882e1]
    __bc_fill_module_MOD_hypfill
    /raid/testing/castro-gfortran/Castro//Source/problems/bc_fill_1d.F90:41

 5: ./Castro1d.gnu.DEBUG.MPI.ex() [0x888045]
    ca_hypfill
    /raid/testing/castro-gfortran/Castro//Source/problems/bc_fill_1d.F90:66

 6: ./Castro1d.gnu.DEBUG.MPI.ex() [0x597a63]
    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:113

 7: ./Castro1d.gnu.DEBUG.MPI.ex() [0x592b7b]
    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: ./Castro1d.gnu.DEBUG.MPI.ex() [0x593fd6]
    amrex::StateDataPhysBCFunct::FillBoundary(amrex::MultiFab&, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_StateData.cpp:843

 9: ./Castro1d.gnu.DEBUG.MPI.ex() [0x546102]
    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: ./Castro1d.gnu.DEBUG.MPI.ex() [0x575c6b]
    amrex::FillPatchIterator::FillFromLevel0(double, int, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:1039

11: ./Castro1d.gnu.DEBUG.MPI.ex() [0x5755de]
    amrex::FillPatchIterator::Initialize(int, double, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:946

12: ./Castro1d.gnu.DEBUG.MPI.ex() [0x573d8d]
    amrex::FillPatchIterator::FillPatchIterator(amrex::AmrLevel&, amrex::MultiFab&, int, double, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:653

13: ./Castro1d.gnu.DEBUG.MPI.ex() [0x57b2d3]
    amrex::AmrLevel::FillPatch(amrex::AmrLevel&, amrex::MultiFab&, int, double, int, int, int, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:2097

14: ./Castro1d.gnu.DEBUG.MPI.ex() [0x578ded]
    amrex::AmrLevel::derive(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, double, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:1587

15: ./Castro1d.gnu.DEBUG.MPI.ex() [0x41415c]
    Castro::derive(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, double, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:2959

16: ./Castro1d.gnu.DEBUG.MPI.ex() [0x437f69]
    Castro::plotFileOutput(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::ostream&, amrex::VisMF::How, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_io.cpp:1130

17: ./Castro1d.gnu.DEBUG.MPI.ex() [0x436f96]
    Castro::writePlotFile(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::ostream&, amrex::VisMF::How)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_io.cpp:903

18: ./Castro1d.gnu.DEBUG.MPI.ex() [0x562124]
    amrex::Amr::writePlotFile()
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:854 (discriminator 2)

19: ./Castro1d.gnu.DEBUG.MPI.ex() [0x563331]
    amrex::Amr::init(double, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1110

20: ./Castro1d.gnu.DEBUG.MPI.ex() [0x43a67e]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:120

21: /lib64/libc.so.6(__libc_start_main+0xea) [0x7f3240526f2a]
    ??
    ??:0

22: ./Castro1d.gnu.DEBUG.MPI.ex() [0x409b6a]
    _start
    ??:?