=== 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() [0x5ae4e8]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:107

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5ae2f0]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4ec00c]
    amrex::ParallelDescriptor::Abort(int, bool)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:224

 3: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4ac888]
    amrex::Error(char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:171

 4: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4af817]
    amrex_fi_error
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_error_fi.cpp:9

 5: ./Castro2d.gnu.DEBUG.MPI.ex() [0x75cfe5]
    __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() [0x90a032]
    check_equal_
    /raid/testing/castro-gfortran/Castro/Exec/science/wdmerger/tests/wdmerger_retry/set_indices.F90:23

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x90a5a3]
    ca_set_godunov_indices_
    /raid/testing/castro-gfortran/Castro/Exec/science/wdmerger/tests/wdmerger_retry/set_indices.F90:183 (discriminator 3)

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x8bddde]
    ca_set_method_params
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_nd.F90:637

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x431401]
    Castro::variableSetUp()
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_setup.cpp:206

10: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4464c1]
    CastroBld::variableSetUp()
    /raid/testing/castro-gfortran/Castro//Source/driver/CastroBld.cpp:34

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5f892a]
    amrex::Amr::InitAmr()
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:267

12: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5f825c]
    amrex::Amr::Amr()
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:242

13: ./Castro2d.gnu.DEBUG.MPI.ex() [0x446b2b]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:110 (discriminator 3)

14: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f076856c413]
    ??
    ??:0

15: ./Castro2d.gnu.DEBUG.MPI.ex() [0x40a5be]
    _start
    ??:?