=== 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: ./Castro1d.gnu.DEBUG.MPI.ex(+0x274044) [0x55f7a11a7044]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:163:29

 1: ./Castro1d.gnu.DEBUG.MPI.ex(+0x273c8e) [0x55f7a11a6c8e]
    amrex::BLBackTrace::handler(int)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:71:8

 2: /lib64/libc.so.6(+0x3c6b0) [0x7f0cfeff26b0]
    __restore_rt
??:0

 3: ./Castro1d.gnu.DEBUG.MPI.ex(+0x10b568) [0x55f7a103e568]
    std::__uniq_ptr_impl<HypreABec, std::default_delete<HypreABec> >::_M_ptr() const
/usr/include/c++/9/bits/unique_ptr.h:154:58

 4: ./Castro1d.gnu.DEBUG.MPI.ex(+0x10b4b8) [0x55f7a103e4b8]
    std::unique_ptr<HypreABec, std::default_delete<HypreABec> >::get() const
/usr/include/c++/9/bits/unique_ptr.h:353:31

 5: ./Castro1d.gnu.DEBUG.MPI.ex(+0x10b2bc) [0x55f7a103e2bc]
    std::unique_ptr<HypreABec, std::default_delete<HypreABec> >::operator bool() const
/usr/include/c++/9/bits/unique_ptr.h:367:45

 6: ./Castro1d.gnu.DEBUG.MPI.ex(+0x1044e7) [0x55f7a10374e7]
    RadSolve::levelBndry(RadBndry&)
/raid/testing/castro-gfortran/Castro//Source/radiation/RadSolve.cpp:124:3

 7: ./Castro1d.gnu.DEBUG.MPI.ex(+0x114e55) [0x55f7a1047e55]
    Radiation::single_group_update(int, int, int)
/raid/testing/castro-gfortran/Castro//Source/radiation/SGRadSolver.cpp:148:7

 8: ./Castro1d.gnu.DEBUG.MPI.ex(+0x127e36) [0x55f7a105ae36]
    Castro::final_radiation_call(amrex::MultiFab&, int, int)
/raid/testing/castro-gfortran/Castro//Source/radiation/Castro_radiation.cpp:49:36

 9: ./Castro1d.gnu.DEBUG.MPI.ex(+0x3e099) [0x55f7a0f71099]
    Castro::advance(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:187:21

10: ./Castro1d.gnu.DEBUG.MPI.ex(+0x2dba1d) [0x55f7a120ea1d]
    amrex::Amr::timeStep(int, double, int, int, double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2112:44

11: ./Castro1d.gnu.DEBUG.MPI.ex(+0x2dc25d) [0x55f7a120f25d]
    amrex::Amr::coarseTimeStep(double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2439:26

12: ./Castro1d.gnu.DEBUG.MPI.ex(+0x6b668) [0x55f7a0f9e668]
    main
/raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:152:5

13: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f0cfefdd1a3]
    __libc_start_main
??:0

14: ./Castro1d.gnu.DEBUG.MPI.ex(+0x14c9e) [0x55f7a0f47c9e]
    _start
??:0