=== 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() [0x56a642]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:107

 1: ./Castro2d.gnu.DEBUG.MPI.ex() [0x56a44b]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4c7592]
    amrex::ParallelDescriptor::Abort(int, bool)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:225

 3: ./Castro2d.gnu.DEBUG.MPI.ex() [0x48a273]
    amrex::Assert(char const*, char const*, int, char const*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:278

 4: ./Castro2d.gnu.DEBUG.MPI.ex() [0x547612]
    amrex::FabArrayBase::getTileArray(amrex::IntVect const&) const
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_FabArrayBase.cpp:1463 (discriminator 3)

 5: ./Castro2d.gnu.DEBUG.MPI.ex() [0x55af23]
    amrex::MFIter::Initialize()
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_MFIter.cpp:166

 6: ./Castro2d.gnu.DEBUG.MPI.ex() [0x55a667]
    amrex::MFIter::MFIter(amrex::FabArrayBase const&, unsigned char)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_MFIter.cpp:24

 7: ./Castro2d.gnu.DEBUG.MPI.ex() [0x6164a8]
    amrex::MLCellLinOp::MetricFactor::MetricFactor(amrex::BoxArray const&, amrex::DistributionMapping const&, amrex::Geometry const&, bool)
    /raid/testing/castro-gfortran/AMReX//Src/LinearSolvers/MLMG/AMReX_MLCellLinOp.cpp:767 (discriminator 1)

 8: ./Castro2d.gnu.DEBUG.MPI.ex() [0x611608]
    amrex::MLCellLinOp::defineAuxData()
    /raid/testing/castro-gfortran/AMReX//Src/LinearSolvers/MLMG/AMReX_MLCellLinOp.cpp:85 (discriminator 2)

 9: ./Castro2d.gnu.DEBUG.MPI.ex() [0x610e48]
    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:25

10: ./Castro2d.gnu.DEBUG.MPI.ex() [0x63231c]
    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

11: ./Castro2d.gnu.DEBUG.MPI.ex() [0x6322a1]
    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

12: ./Castro2d.gnu.DEBUG.MPI.ex() [0x46e3c9]
    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:2592

13: ./Castro2d.gnu.DEBUG.MPI.ex() [0x46dc8a]
    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

14: ./Castro2d.gnu.DEBUG.MPI.ex() [0x4651b7]
    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

15: ./Castro2d.gnu.DEBUG.MPI.ex() [0x464d2c]
    Gravity::multilevel_solve_for_new_phi(int, int, int)
    /raid/testing/castro-gfortran/Castro//Source/gravity/Gravity.cpp:680 (discriminator 2)

16: ./Castro2d.gnu.DEBUG.MPI.ex() [0x412867]
    Castro::post_init(double)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:1988

17: ./Castro2d.gnu.DEBUG.MPI.ex() [0x590a41]
    amrex::Amr::FinalizeInit(double, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1313 (discriminator 2)

18: ./Castro2d.gnu.DEBUG.MPI.ex() [0x590541]
    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

19: ./Castro2d.gnu.DEBUG.MPI.ex() [0x58ff09]
    amrex::Amr::init(double, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:1114

20: ./Castro2d.gnu.DEBUG.MPI.ex() [0x44379c]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:120

21: /lib64/libc.so.6(__libc_start_main+0xea) [0x7fe14b599f2a]
    ??
    ??:0

22: ./Castro2d.gnu.DEBUG.MPI.ex() [0x409d7a]
    _start
    ??:?