=== 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.ex() [0x56ba48]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:104

 1: ./Castro3d.gnu.DEBUG.MPI.ex() [0x56b89b]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:51

 2: ./Castro3d.gnu.DEBUG.MPI.ex() [0x4c59e7]
    amrex::ParallelDescriptor::Abort(int, bool)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:323

 3: ./Castro3d.gnu.DEBUG.MPI.ex() [0x477155]
    amrex::Abort(char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:191

 4: ./Castro3d.gnu.DEBUG.MPI.ex() [0x438454]
    Castro::subcycle_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:970

 5: ./Castro3d.gnu.DEBUG.MPI.ex() [0x43794a]
    Castro::retry_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:884

 6: ./Castro3d.gnu.DEBUG.MPI.ex() [0x4355d2]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:129

 7: ./Castro3d.gnu.DEBUG.MPI.ex() [0x59a0a8]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1960

 8: ./Castro3d.gnu.DEBUG.MPI.ex() [0x59a898]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2070

 9: ./Castro3d.gnu.DEBUG.MPI.ex() [0x447a87]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:132

10: /lib64/libc.so.6(__libc_start_main+0xea) [0x7fc5777a088a]
    ??
    ??:0

11: ./Castro3d.gnu.DEBUG.MPI.ex() [0x40a3ea]
    _start
    ??:?