=== 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: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x5a9bae]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:107

 1: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x5a99b6]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x4e2ef2]
    amrex::ParallelDescriptor::Abort(int, bool)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:223

 3: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x4a3b8e]
    amrex::Abort(char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:252

 4: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x418019]
    Castro::check_for_nan(amrex::MultiFab&, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:3585

 5: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x42cf7a]
    Castro::do_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:300

 6: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x430003]
    Castro::subcycle_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:1238

 7: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x42c9f8]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:103

 8: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x6075db]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2079

 9: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x607a3d]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2140

10: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x607d73]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2366

11: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x446d65]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:133

12: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7fa77d15d413]
    ??
    ??:0

13: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x40b67e]
    _start
    ??:?