=== 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.

=== 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() [0x600dec]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*) at /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:107

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x600bf4]
    amrex::BLBackTrace::handler(int) at /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: /lib64/libc.so.6(+0x385c0) [0x7f73fae4f5c0]
    ?? ??:0

 3: ./Castro2d.gnu.DEBUG.MPI.ex() [0x7f3610]
    ca_reset_internal_e at /raid/testing/castro-gfortran/Castro//Source/driver/Castro_util.F90:237 (discriminator 16)

 4: ./Castro2d.gnu.DEBUG.MPI.ex() [0x416c23]
    Castro::reset_internal_energy(amrex::MultiFab&) at /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:3238 (discriminator 2)

 5: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4177c6]
    Castro::computeTemp(int, int) at /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:3366

 6: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4196e8]
    Castro::clean_state(int, amrex::MultiFab&, int) at /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:4010 (discriminator 4)

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4195db]
    Castro::clean_state(int, int) at /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:3975

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x418f5b]
    Castro::expand_state(amrex::MultiFab&, double, int, int) at /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:3882

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x42c016]
    Castro::initialize_do_advance(double, double, int, int) at /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:252

10: ./Castro2d.gnu.DEBUG.MPI.ex() [0x442020]
    Castro::do_advance_ctu(double, double, int, int) at /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:42

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4434cc]
    Castro::subcycle_advance_ctu(double, double, int, int) at /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:486

12: ./Castro2d.gnu.DEBUG.MPI.ex() [0x42b87c]
    Castro::advance(double, double, int, int) at /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:53

13: ./Castro2d.gnu.DEBUG.MPI.ex() [0x6511bb]
    amrex::Amr::timeStep(int, double, int, int, double) at /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2103

14: ./Castro2d.gnu.DEBUG.MPI.ex() [0x651953]
    amrex::Amr::coarseTimeStep(double) at /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2390

15: ./Castro2d.gnu.DEBUG.MPI.ex() [0x45b349]
    main at /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:133

16: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f73fae3b413]
    ?? ??:0

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