=== 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.ex() [0x4e2d6a]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:105

 1: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x4e3bc8]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:51

 2: /lib64/libstdc++.so.6(_Znwm+0x2c) [0x7fc896fa43fc]
    ??
    ??:0

 3: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x4989e3]
    amrex::CArena::alloc(unsigned long)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_CArena.cpp:48

 4: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x55d114]
    __mempool_module_MOD_bl_allocate_r3_vc
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_mempool_f.f90:372

 5: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x699c49]
    ca_ctu_update
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_ctu_nd.F90:198

 6: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x4370a7]
    std::__uniq_ptr_impl<amrex::MultiFab, std::default_delete<amrex::MultiFab> >::_M_ptr() const
    /usr/include/c++/7/bits/unique_ptr.h:147
    std::unique_ptr<amrex::MultiFab, std::default_delete<amrex::MultiFab> >::get() const
    /usr/include/c++/7/bits/unique_ptr.h:337
    std::unique_ptr<amrex::MultiFab, std::default_delete<amrex::MultiFab> >::operator*() const
    /usr/include/c++/7/bits/unique_ptr.h:323
    Castro::construct_hydro_source(double, double)
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_hydro.cpp:155

 7: /lib64/libgomp.so.1(GOMP_parallel+0x3f) [0x7fc8969dccdf]
    ??
    ??:0

 8: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x437734]
    Castro::construct_hydro_source(double, double)
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_hydro.cpp:209

 9: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x4219d9]
    Castro::do_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:270

10: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x4242ed]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:104

11: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x50f000]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1908

12: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x5029eb]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2018

13: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x40a8de]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:132

14: /lib64/libc.so.6(__libc_start_main+0xea) [0x7fc8961e488a]
    ??
    ??:0

15: ./Castro1d.gnu.TEST.MPI.OMP.ex() [0x40fbba]
    _start
    ??:?