=== 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.

=== 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: ./Castro1d.gnu.TEST.MPI.ex() [0x4f8409]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*) at /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:108

 1: ./Castro1d.gnu.TEST.MPI.ex() [0x4f9479]
    amrex::BLBackTrace::handler(int) at /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: ./Castro1d.gnu.TEST.MPI.ex() [0x42cfbc]
    Castro::advance(double, double, int, int) at /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:139

 3: ./Castro1d.gnu.TEST.MPI.ex() [0x531245]
    amrex::Amr::timeStep(int, double, int, int, double) at /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2101

 4: ./Castro1d.gnu.TEST.MPI.ex() [0x5270d6]
    amrex::Amr::coarseTimeStep(double) at /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2413

 5: ./Castro1d.gnu.TEST.MPI.ex() [0x41847a]
    main at /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:133

 6: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f2516f0b413]
    ?? ??:0

 7: ./Castro1d.gnu.TEST.MPI.ex() [0x41c82e]
    _start at ??:?