=== 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.DEBUG.MPI.ex() [0x587180]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:104

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x586fd3]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:51

 2: /lib64/libc.so.6(+0x376f0) [0x7fa9602dd6f0]
    ??
    ??:0

 3: /lib64/libc.so.6(gsignal+0xcb) [0x7fa9602dd66b]
    ??
    ??:0

 4: /lib64/libc.so.6(abort+0x141) [0x7fa9602df381]
    ??
    ??:0

 5: /lib64/libgcc_s.so.1(+0x340d) [0x7fa96068c40d]
    ??
    ??:0

 6: ./Castro2d.gnu.DEBUG.MPI.ex() [0x12af2ae]
    set_problem_tags
    /raid/testing/castro-gfortran/Castro//Exec/science/wdmerger/problem_tagging_nd.F90:10

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x42ae31]
    Castro::apply_problem_tags(amrex::TagBoxArray&, int, int, double)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:2775 (discriminator 1)

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x42a9a4]
    Castro::errorEst(amrex::TagBoxArray&, int, int, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:2733

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5b3981]
    amrex::Amr::ErrorEst(int, amrex::TagBoxArray&, double, int)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2812

10: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5a3ee0]
    amrex::AmrMesh::MakeNewGrids(int, double, int&, amrex::Vector<amrex::BoxArray, std::allocator<amrex::BoxArray> >&)
    /raid/testing/castro-gfortran/AMReX//Src/AmrCore/AMReX_AmrMesh.cpp:523

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5b3779]
    amrex::Amr::grid_places(int, double, int&, amrex::Vector<amrex::BoxArray, std::allocator<amrex::BoxArray> >&)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2793

12: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5b3ae2]
    amrex::Amr::bldFineLevels(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2842

13: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5aba33]
    amrex::Amr::FinalizeInit(double, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1305

14: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5ab79f]
    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:1242

15: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5ab16b]
    amrex::Amr::init(double, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1121

16: ./Castro2d.gnu.DEBUG.MPI.ex() [0x455078]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:120

17: /lib64/libc.so.6(__libc_start_main+0xea) [0x7fa9602c700a]
    ??
    ??:0

18: ./Castro2d.gnu.DEBUG.MPI.ex() [0x40af4a]
    _start
    ??:?