=== If no file names and line numbers are shown below, one can run
            addr2line -Cpfie my_exefile my_line_address
    to convert `my_line_address` (e.g., 0x4a6b) into file name and line number.
    Or one can use amrex/Tools/Backtrace/parse_bt.py.

=== 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() [0x65da66]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:163:29

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x65d760]
    amrex::BLBackTrace::handler(int)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:71:8

 2: ./Castro2d.gnu.DEBUG.MPI.ex() [0x56f1ae]
    amrex::ParallelDescriptor::Abort(int, bool)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:224:22

 3: ./Castro2d.gnu.DEBUG.MPI.ex() [0x52f887]
    amrex::Abort(char const*)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:206:1

 4: ./Castro2d.gnu.DEBUG.MPI.ex() [0x446770]
    Castro::subcycle_advance_ctu(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:493:13

 5: ./Castro2d.gnu.DEBUG.MPI.ex() [0x431277]
    Castro::advance(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:55:55

 6: ./Castro2d.gnu.DEBUG.MPI.ex() [0x6d499f]
    amrex::Amr::timeStep(int, double, int, int, double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2112:44

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x6d4e01]
    amrex::Amr::timeStep(int, double, int, int, double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2173:13

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x6d5137]
    amrex::Amr::coarseTimeStep(double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2439:26

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x46029a]
    main
/raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:143:5

10: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f8a0ca07413]
    __libc_start_main
??:0

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x40c97e]
    _start
??:0