=== 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: ./Castro1d.gnu.TEST.MPI.ex() [0x52b20a]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:105

 1: ./Castro1d.gnu.TEST.MPI.ex() [0x52c048]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:51

 2: ./Castro1d.gnu.TEST.MPI.ex() [0x416013]
    Castro::check_for_nan(amrex::MultiFab&, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:3379

 3: ./Castro1d.gnu.TEST.MPI.ex() [0x423bec]
    Castro::do_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:269

 4: ./Castro1d.gnu.TEST.MPI.ex() [0x426b25]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:119

 5: ./Castro1d.gnu.TEST.MPI.ex() [0x55841d]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1908

 6: ./Castro1d.gnu.TEST.MPI.ex() [0x54be6b]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2019

 7: ./Castro1d.gnu.TEST.MPI.ex() [0x40c4ee]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:132

 8: /lib64/libc.so.6(__libc_start_main+0xea) [0x7fb5fdb9888a]
    ??
    ??:0

 9: ./Castro1d.gnu.TEST.MPI.ex() [0x4137aa]
    _start
    ??:?