=== 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() [0x5fc5ca]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:107

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5fc3d2]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: ./Castro2d.gnu.DEBUG.MPI.ex() [0x541b2e]
    amrex::ParallelDescriptor::Abort(int, bool)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:224

 3: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5033d1]
    amrex::Error(char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:171

 4: ./Castro2d.gnu.DEBUG.MPI.ex() [0x50634f]
    amrex_fi_error
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_error_fi.cpp:9

 5: ./Castro2d.gnu.DEBUG.MPI.ex() [0x74f450]
    __amrex_error_module_MOD_amrex_error0
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_error_mod.F90:36 (discriminator 4)

 6: ./Castro2d.gnu.DEBUG.MPI.ex() [0x829817]
    check_equal_
    /raid/testing/castro-gfortran/Castro/Exec/radiation_tests/Rad2Tshock/set_indices.F90:23

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x829e2a]
    ca_set_godunov_indices_
    /raid/testing/castro-gfortran/Castro/Exec/radiation_tests/Rad2Tshock/set_indices.F90:195 (discriminator 3)

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x7dd919]
    ca_set_method_params
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_nd.F90:637

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x443c3a]
    Castro::variableSetUp()
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_setup.cpp:206

10: ./Castro2d.gnu.DEBUG.MPI.ex() [0x456187]
    CastroBld::variableSetUp()
    /raid/testing/castro-gfortran/Castro//Source/driver/CastroBld.cpp:34

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x6464da]
    amrex::Amr::InitAmr()
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:267

12: ./Castro2d.gnu.DEBUG.MPI.ex() [0x645e0c]
    amrex::Amr::Amr()
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:242

13: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4567f1]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:110 (discriminator 3)

14: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7fb0bf0a8413]
    ??
    ??:0

15: ./Castro2d.gnu.DEBUG.MPI.ex() [0x40b7ee]
    _start
    ??:?