=== 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.DEBUG.MPI.ex() [0x5fbf3e]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:107

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5fbd46]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5414a2]
    amrex::ParallelDescriptor::Abort(int, bool)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:224

 3: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5034e0]
    amrex::Assert(char const*, char const*, int, char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:341

 4: ./Castro2d.gnu.DEBUG.MPI.ex() [0x41bb6e]
    amrex::FabArray<amrex::FArrayBox>::fabHostPtr(amrex::MFIter const&)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_FabArray.H:820

 5: ./Castro2d.gnu.DEBUG.MPI.ex() [0x41bc0b]
    amrex::Array4<double> amrex::FabArray<amrex::FArrayBox>::array<std::enable_if<true, void> >(amrex::MFIter const&)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_FabArray.H:924

 6: ./Castro2d.gnu.DEBUG.MPI.ex() [0x46a91d]
    Castro::construct_hydro_source(double, double)
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_hydro.cpp:1151

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x42a115]
    Castro::do_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:271

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x42da34]
    Castro::subcycle_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:1245

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x429d42]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:102

10: ./Castro2d.gnu.DEBUG.MPI.ex() [0x64e00d]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2099

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x64e7a5]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2386

12: ./Castro2d.gnu.DEBUG.MPI.ex() [0x456671]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:133

13: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f5e7f8a3413]
    ??
    ??:0

14: ./Castro2d.gnu.DEBUG.MPI.ex() [0x40b7ee]
    _start
    ??:?