=== 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() [0x5b597e]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:107

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5b5786]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4dec92]
    amrex::ParallelDescriptor::Abort(int, bool)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:221

 3: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4a16cb]
    amrex::Assert(char const*, char const*, int, char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:333

 4: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5f3694]
    amrex::AmrLevel::getEdgeBoxArray(int) const
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_AmrLevel.cpp:559

 5: ./Castro2d.gnu.DEBUG.MPI.ex() [0x499856]
    Castro::construct_new_gravity_source(amrex::MultiFab&, amrex::MultiFab&, amrex::MultiFab&, double, double)
    /raid/testing/castro-gfortran/Castro//Source/gravity/Castro_gravity.cpp:294 (discriminator 4)

 6: ./Castro2d.gnu.DEBUG.MPI.ex() [0x467c9a]
    Castro::construct_new_source(int, amrex::MultiFab&, amrex::MultiFab&, amrex::MultiFab&, double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/sources/Castro_sources.cpp:260

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x467981]
    Castro::do_new_sources(amrex::MultiFab&, amrex::MultiFab&, amrex::MultiFab&, double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/sources/Castro_sources.cpp:143 (discriminator 2)

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x42cbcc]
    Castro::do_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:328

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4303fd]
    Castro::subcycle_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:1238

10: ./Castro2d.gnu.DEBUG.MPI.ex() [0x42c56a]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:103

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5e74c5]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2058

12: ./Castro2d.gnu.DEBUG.MPI.ex() [0x5e7c5d]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2310

13: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4469c7]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:133

14: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f3c9059f413]
    ??
    ??:0

15: ./Castro2d.gnu.DEBUG.MPI.ex() [0x40a53e]
    _start
    ??:?