=== 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: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x5771b2]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:107

 1: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x576fbb]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x4cb78c]
    amrex::ParallelDescriptor::Abort(int, bool)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:225

 3: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x48dfd0]
    amrex::Assert(char const*, char const*, int, char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:278

 4: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x55131b]
    amrex::FabArrayBase::getTileArray(amrex::IntVect const&) const
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_FabArrayBase.cpp:1463 (discriminator 2)

 5: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x564d91]
    amrex::MFIter::Initialize()
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_MFIter.cpp:166

 6: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x56447f]
    amrex::MFIter::MFIter(amrex::FabArrayBase const&, unsigned char)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_MFIter.cpp:24

 7: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x6310af]
    amrex::MLCellLinOp::BndryCondLoc::setLOBndryConds(amrex::Geometry const&, double const*, std::array<amrex::LinOpBCType, 3ul> const&, std::array<amrex::LinOpBCType, 3ul> const&, int, amrex::RealVect const&) [clone ._omp_fn.11]
    /raid/testing/castro-gfortran/AMReX//Src/LinearSolvers/MLMG/AMReX_MLCellLinOp.cpp:684 (discriminator 4)

 8: /lib64/libgomp.so.1(GOMP_parallel+0x3f) [0x7f3580ecccdf]
    ??
    ??:0

 9: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x62ed49]
    amrex::MLCellLinOp::BndryCondLoc::setLOBndryConds(amrex::Geometry const&, double const*, std::array<amrex::LinOpBCType, 3ul> const&, std::array<amrex::LinOpBCType, 3ul> const&, int, amrex::RealVect const&)
    /raid/testing/castro-gfortran/AMReX//Src/LinearSolvers/MLMG/AMReX_MLCellLinOp.cpp:692

10: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x62d2c2]
    amrex::MLCellLinOp::setLevelBC(int, amrex::MultiFab const*)
    /raid/testing/castro-gfortran/AMReX//Src/LinearSolvers/MLMG/AMReX_MLCellLinOp.cpp:237 (discriminator 4)

11: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x46b1a4]
    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*, 3ul>, std::allocator<std::array<amrex::MultiFab*, 3ul> > > const&, amrex::Vector<amrex::MultiFab*, std::allocator<amrex::MultiFab*> > const&, amrex::MultiFab const*, double, double)
    /raid/testing/castro-gfortran/Castro//Source/gravity/Gravity.cpp:2601 (discriminator 2)

12: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x46a957]
    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:2528

13: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x46298a]
    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:733

14: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x4624f6]
    Gravity::multilevel_solve_for_new_phi(int, int, int)
    /raid/testing/castro-gfortran/Castro//Source/gravity/Gravity.cpp:680 (discriminator 2)

15: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x41191d]
    Castro::post_init(double)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:1988

16: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x5a0c95]
    amrex::Amr::FinalizeInit(double, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1313 (discriminator 2)

17: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x5a0795]
    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:1235

18: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x5a01d5]
    amrex::Amr::init(double, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1114

19: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x442b20]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:120

20: /lib64/libc.so.6(__libc_start_main+0xea) [0x7f35806f4f2a]
    ??
    ??:0

21: ./Castro3d.gnu.DEBUG.MPI.OMP.ex() [0x40a25a]
    _start
    ??:?