=== 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() [0x571d3e]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:102

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x571b90]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:49

 2: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4cea36]
    amrex::ParallelDescriptor::Abort(int, bool)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:225

 3: ./Castro2d.gnu.DEBUG.MPI.ex() [0x495b4b]
    amrex::Error(char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:123

 4: ./Castro2d.gnu.DEBUG.MPI.ex() [0x495d8b]
    bl_error_cpp_
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:168

 5: ./Castro2d.gnu.DEBUG.MPI.ex() [0xfe3ea6]
    bl_error_
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBoxLib_F.F90:14

 6: ./Castro2d.gnu.DEBUG.MPI.ex() [0x1183068]
    __advection_util_module_MOD_enforce_minimum_density
    /raid/testing/castro-gfortran/Castro//Source/hydro/advection_util_nd.F90:74

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x110394a]
    ca_enforce_minimum_density
    /raid/testing/castro-gfortran/Castro//Source/driver/castro_c_interfaces_nd.F90:133

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4294d8]
    Castro::enforce_min_density(amrex::MultiFab&, amrex::MultiFab&)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:2658 (discriminator 3)

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x42d35e]
    Castro::clean_state(amrex::MultiFab&)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:3517

10: ./Castro2d.gnu.DEBUG.MPI.ex() [0x43a210]
    Castro::initialize_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:821

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x437ff7]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:99

12: ./Castro2d.gnu.DEBUG.MPI.ex() [0x59ab3c]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1926

13: ./Castro2d.gnu.DEBUG.MPI.ex() [0x59b32c]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2036

14: ./Castro2d.gnu.DEBUG.MPI.ex() [0x451a57]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:132

15: /lib64/libc.so.6(__libc_start_main+0xea) [0x7f83a1705f2a]
    ??
    ??:0

16: ./Castro2d.gnu.DEBUG.MPI.ex() [0x40ae4a]
    _start
    ??:?