=== 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: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x522429]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:108

 1: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x52300c]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x481814]
    amrex::Abort(char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:257

 3: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x425e21]
    Castro::check_for_nan(amrex::MultiFab&, int)
    /usr/include/c++/8/bits/basic_string.h:211
    ??
    /usr/include/c++/8/bits/basic_string.h:220
    ??
    /usr/include/c++/8/bits/basic_string.h:657
    Castro::check_for_nan(amrex::MultiFab&, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:3585

 4: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x433981]
    Castro::do_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:300

 5: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x433d72]
    Castro::subcycle_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:1238

 6: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x4364b2]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:103

 7: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x5662e5]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2079

 8: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x55bc76]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2366

 9: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x41bcaa]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:133

10: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7fa81fb77413]
    ??
    ??:0

11: ./Castro2d.gnu.TEST.MPI.OMP.ex() [0x4206fe]
    _start
    ??:?