=== 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: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x4ef1f9]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:108

 1: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x4efddc]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: /lib64/libc.so.6(+0x385c0) [0x7f8842ad95c0]
    ??
    ??:0

 3: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x5cf075]
    scale_flux
    /raid/testing/castro-gfortran/Castro//Source/hydro/advection_util_nd.F90:1916

 4: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x60ae10]
    ca_ctu_update
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_ctu_nd.F90:2544

 5: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x448c83]
    Castro::construct_hydro_source(double, double) [clone ._omp_fn.0]
    /usr/include/c++/8/bits/unique_ptr.h:150
    ??
    /usr/include/c++/8/bits/unique_ptr.h:343
    ??
    /usr/include/c++/8/bits/unique_ptr.h:329
    Castro::construct_hydro_source(double, double)
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_hydro.cpp:163

 6: /lib64/libgomp.so.1(GOMP_parallel+0x43) [0x7f8842cb27b3]
    ??
    ??:0

 7: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x446f98]
    Castro::construct_hydro_source(double, double)
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_hydro.cpp:212

 8: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x42af1b]
    Castro::do_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:275

 9: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x42d769]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:69

10: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x5287e5]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2079

11: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x51e666]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2366

12: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x417dda]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:133

13: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f8842ac5413]
    ??
    ??:0

14: ./Castro1d.gnu.TEST.MPI.OMP.SDC.ex() [0x41bb3e]
    _start
    ??:?