=== 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.
    Or one can use amrex/Tools/Backtrace/parse_bt.py.

=== 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() [0x608e50]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:163:29

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x608b4a]
    amrex::BLBackTrace::handler(int)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:71:8

 2: ./Castro2d.gnu.DEBUG.MPI.ex() [0x514bee]
    amrex::ParallelDescriptor::Abort(int, bool)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:224:22

 3: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4d3081]
    amrex::Abort(char const*)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:206:1

 4: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4d30c2]
    amrex::Abort(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:212:1

 5: ./Castro2d.gnu.DEBUG.MPI.ex() [0x59871a]
    amrex::Array4<int const>::index_assert(int, int, int, int) const
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_Array4.H:181:29

 6: ./Castro2d.gnu.DEBUG.MPI.ex() [0x6d9f53]
    int const& amrex::Array4<int const>::operator()<int const, void>(int, int, int) const inlined at /raid/testing/castro-gfortran/AMReX//Src/Boundary/AMReX_InterpBndryData_2D_K.H:95:32 in amrex::InterpBndryData::BndryValuesDoIt(amrex::BndryRegister&, int, amrex::MultiFab const*, int, int, int, amrex::IntVect const&, amrex::BCRec const*, int)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_Array4.H:66:20
amrex::interpbndrydata_y_o3(int, int, int, int, amrex::Array4<double> const&, int, amrex::Array4<double const> const&, int, amrex::Dim3 const&, amrex::Array4<int const> const&, int)
/raid/testing/castro-gfortran/AMReX//Src/Boundary/AMReX_InterpBndryData_2D_K.H:95:32
amrex::InterpBndryData::BndryValuesDoIt(amrex::BndryRegister&, int, amrex::MultiFab const*, int, int, int, amrex::IntVect const&, amrex::BCRec const*, int)
/raid/testing/castro-gfortran/AMReX//Src/Boundary/AMReX_InterpBndryData.cpp:236:29

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x6d6cdc]
    amrex::InterpBndryData::setBndryValues(amrex::BndryRegister&, int, amrex::MultiFab const&, int, int, int, amrex::IntVect const&, amrex::BCRec const&, int)
/raid/testing/castro-gfortran/AMReX//Src/Boundary/AMReX_InterpBndryData.cpp:144:21

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x6db62e]
    amrex::InterpBndryData::setBndryValues(amrex::BndryRegister&, int, amrex::MultiFab const&, int, int, int, int, amrex::BCRec const&, int)
/raid/testing/castro-gfortran/AMReX//Src/Boundary/AMReX_InterpBndryData.cpp:297:19

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x7273f5]
    amrex::MLCellLinOp::defineBC()
/raid/testing/castro-gfortran/AMReX//Src/LinearSolvers/MLMG/AMReX_MLCellLinOp.cpp:134:44

10: ./Castro2d.gnu.DEBUG.MPI.ex() [0x7265d4]
    amrex::MLCellLinOp::define(amrex::Vector<amrex::Geometry, std::allocator<amrex::Geometry> > const&, amrex::Vector<amrex::BoxArray, std::allocator<amrex::BoxArray> > const&, amrex::Vector<amrex::DistributionMapping, std::allocator<amrex::DistributionMapping> > const&, amrex::LPInfo const&, amrex::Vector<amrex::FabFactory<amrex::FArrayBox> const*, std::allocator<amrex::FabFactory<amrex::FArrayBox> const*> > const&)
/raid/testing/castro-gfortran/AMReX//Src/LinearSolvers/MLMG/AMReX_MLCellLinOp.cpp:26:1

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x74fc98]
    amrex::MLCellABecLap::define(amrex::Vector<amrex::Geometry, std::allocator<amrex::Geometry> > const&, amrex::Vector<amrex::BoxArray, std::allocator<amrex::BoxArray> > const&, amrex::Vector<amrex::DistributionMapping, std::allocator<amrex::DistributionMapping> > const&, amrex::LPInfo const&, amrex::Vector<amrex::FabFactory<amrex::FArrayBox> const*, std::allocator<amrex::FabFactory<amrex::FArrayBox> const*> > const&)
/raid/testing/castro-gfortran/AMReX//Src/LinearSolvers/MLMG/AMReX_MLCellABecLap.cpp:26:1

12: ./Castro2d.gnu.DEBUG.MPI.ex() [0x7719f6]
    amrex::MLPoisson::define(amrex::Vector<amrex::Geometry, std::allocator<amrex::Geometry> > const&, amrex::Vector<amrex::BoxArray, std::allocator<amrex::BoxArray> > const&, amrex::Vector<amrex::DistributionMapping, std::allocator<amrex::DistributionMapping> > const&, amrex::LPInfo const&, amrex::Vector<amrex::FabFactory<amrex::FArrayBox> const*, std::allocator<amrex::FabFactory<amrex::FArrayBox> const*> > const&)
/raid/testing/castro-gfortran/AMReX//Src/LinearSolvers/MLMG/AMReX_MLPoisson.cpp:26:1

13: ./Castro2d.gnu.DEBUG.MPI.ex() [0x77197b]
    amrex::MLPoisson::MLPoisson(amrex::Vector<amrex::Geometry, std::allocator<amrex::Geometry> > const&, amrex::Vector<amrex::BoxArray, std::allocator<amrex::BoxArray> > const&, amrex::Vector<amrex::DistributionMapping, std::allocator<amrex::DistributionMapping> > const&, amrex::LPInfo const&, amrex::Vector<amrex::FabFactory<amrex::FArrayBox> const*, std::allocator<amrex::FabFactory<amrex::FArrayBox> const*> > const&)
/raid/testing/castro-gfortran/AMReX//Src/LinearSolvers/MLMG/AMReX_MLPoisson.cpp:15:1

14: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4abf8b]
    Gravity::actual_solve_with_mlmg(int, int, amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> > const&, amrex::Vector<amrex::MultiFab const*, std::allocator<amrex::MultiFab const*> > const&, amrex::Vector<std::array<amrex::MultiFab*, 2ul>, std::allocator<std::array<amrex::MultiFab*, 2ul> > > const&, amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> > const&, amrex::MultiFab const*, double, double)
/raid/testing/castro-gfortran/Castro//Source/gravity/Gravity.cpp:2734:44

15: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4ab85f]
    Gravity::solve_phi_with_mlmg(int, int, amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> > const&, amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> > const&, amrex::Vector<amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> >, std::allocator<amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> > > > const&, amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> > const&, double)
/raid/testing/castro-gfortran/Castro//Source/gravity/Gravity.cpp:2669:34

16: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4a0e54]
    Gravity::actual_multilevel_solve(int, int, amrex::Vector<amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> >, std::allocator<amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> > > > const&, int, int)
/raid/testing/castro-gfortran/Castro//Source/gravity/Gravity.cpp:767:28

17: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4a0972]
    Gravity::multilevel_solve_for_new_phi(int, int, int)
/raid/testing/castro-gfortran/Castro//Source/gravity/Gravity.cpp:710:72

18: ./Castro2d.gnu.DEBUG.MPI.ex() [0x415e87]
    Castro::post_init(double)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:2216:49

19: ./Castro2d.gnu.DEBUG.MPI.ex() [0x67c0d7]
    amrex::Amr::FinalizeInit(double, double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1415:5

20: ./Castro2d.gnu.DEBUG.MPI.ex() [0x67bc1a]
    amrex::Amr::initialInit(double, double, amrex::BoxArray const*, amrex::Vector<int, std::allocator<int> > const*)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1337:1

21: ./Castro2d.gnu.DEBUG.MPI.ex() [0x67b541]
    amrex::Amr::init(double, double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1210:13

22: ./Castro2d.gnu.DEBUG.MPI.ex() [0x45b67d]
    main
/raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:131:33

23: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f3acfbed413]
    __libc_start_main
??:0

24: ./Castro2d.gnu.DEBUG.MPI.ex() [0x40b70e]
    _start
??:0