=== 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() [0x5695ee]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:104

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5693f6]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:52

 2: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4c4bf4]
    amrex::ParallelDescriptor::Abort(int, bool)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:225

 3: ./Castro2d.gnu.DEBUG.MPI.ex() [0x48a1c3]
    amrex::Assert(char const*, char const*, int, char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:277

 4: ./Castro2d.gnu.DEBUG.MPI.ex() [0x45e669]
    Castro::print_source_change(amrex::Vector<double, std::allocator<double> >)
    /raid/testing/castro-gfortran/Castro//Source/sources/Castro_sources.cpp:294

 5: ./Castro2d.gnu.DEBUG.MPI.ex() [0x45ea28]
    Castro::print_all_source_changes(double, bool)
    /raid/testing/castro-gfortran/Castro//Source/sources/Castro_sources.cpp:340 (discriminator 3)

 6: ./Castro2d.gnu.DEBUG.MPI.ex() [0x45dfa0]
    Castro::do_old_sources(amrex::MultiFab&, amrex::MultiFab&, double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/sources/Castro_sources.cpp:107

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x429ab1]
    Castro::do_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:254

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x42969f]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:110

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x593299]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1928

10: ./Castro2d.gnu.DEBUG.MPI.ex() [0x593a8a]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2038

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x443797]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:132

12: /lib64/libc.so.6(__libc_start_main+0xea) [0x7f52f82c5f2a]
    ??
    ??:0

13: ./Castro2d.gnu.DEBUG.MPI.ex() [0x409dea]
    _start
    ??:?