=== 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(+0x2afc90) [0x556593480c90]
    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(+0x2af8da) [0x5565934808da]
    amrex::BLBackTrace::handler(int)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:71:8

 2: ./Castro2d.gnu.DEBUG.MPI.ex(+0x18648d) [0x55659335748d]
    amrex::ParallelDescriptor::Abort(int, bool)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:230:22

 3: ./Castro2d.gnu.DEBUG.MPI.ex(+0x136f65) [0x556593307f65]
    amrex::detail::Abort_host_doit(char const*)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:192:1

 4: ./Castro2d.gnu.DEBUG.MPI.ex(+0x2b0e1) [0x5565931fc0e1]
    amrex::Abort(char const*)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.H:125:5

 5: ./Castro2d.gnu.DEBUG.MPI.ex(+0x29cc4) [0x5565931facc4]
    Castro::check_for_nan(amrex::MultiFab&, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:3782:154

 6: ./Castro2d.gnu.DEBUG.MPI.ex(+0x69106) [0x55659323a106]
    Castro::do_advance_ctu(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:86:19

 7: ./Castro2d.gnu.DEBUG.MPI.ex(+0x6a690) [0x55659323b690]
    Castro::subcycle_advance_ctu(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:543:45

 8: ./Castro2d.gnu.DEBUG.MPI.ex(+0x66d68) [0x556593237d68]
    Castro::advance(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:55:55

 9: ./Castro2d.gnu.DEBUG.MPI.ex(+0x334cec) [0x556593505cec]
    amrex::Amr::timeStep(int, double, int, int, double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2112:44

10: ./Castro2d.gnu.DEBUG.MPI.ex(+0x335544) [0x556593506544]
    amrex::Amr::coarseTimeStep(double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2439:26

11: ./Castro2d.gnu.DEBUG.MPI.ex(+0x82dda) [0x556593253dda]
    main
/raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:143:5

12: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f227b8651a3]
    __libc_start_main
??:0

13: ./Castro2d.gnu.DEBUG.MPI.ex(+0x1681e) [0x5565931e781e]
    _start
??:0