#0  0x00007ffff6042ce5 in raise () from /usr/lib/libc.so.6
#1  0x00007ffff602c857 in abort () from /usr/lib/libc.so.6
#2  0x00007ffff63fc81d in __gnu_cxx::__verbose_terminate_handler () at /build/gcc/src/gcc/libstdc++-v3/libsupc++/vterminate.cc:95
#3  0x00007ffff64092ca in __cxxabiv1::__terminate (handler=<optimized out>) at /build/gcc/src/gcc/libstdc++-v3/libsupc++/eh_terminate.cc:48
#4  0x00007ffff6409337 in std::terminate () at /build/gcc/src/gcc/libstdc++-v3/libsupc++/eh_terminate.cc:58
#5  0x00007ffff640959e in __cxxabiv1::__cxa_throw (obj=obj@entry=0x555558d4ad00, tinfo=0x7ffff6541368 <typeinfo for std::out_of_range>,
    dest=0x7ffff641f7b0 <std::out_of_range::~out_of_range()>) at /build/gcc/src/gcc/libstdc++-v3/libsupc++/eh_throw.cc:95
#6  0x00007ffff63ff2f9 in std::__throw_out_of_range (__s=__s@entry=0x555555af7778 "_Map_base::at")
    at /build/gcc/src/gcc/libstdc++-v3/src/c++11/functexcept.cc:82
#7  0x00005555558e07dc in std::__detail::_Map_base<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int>, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> >, std::__detail::_Select1st, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true>, true>::at (
    this=this@entry=0x555555c41cb0, __k="\342\071\035") at /usr/include/c++/9.3.0/bits/hashtable_policy.h:1393
#8  0x00005555558d4db2 in std::unordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> > >::at (
    __k="\342\071\035", this=0x555555c41cb0) at /usr/include/c++/9.3.0/bits/unordered_map.h:1001
#9  nextpnr_xilinx::Arch::getBelByName (this=this@entry=0x555555c418c0, name=...)
    at /home/ricola/Downloads/fpga/esden/test/nextpnr-xilinx/xilinx/arch.cc:150
#10 0x00005555559639c8 in nextpnr_xilinx::XC7Packer::prepare_clocking (this=this@entry=0x7fffffffc900)
    at /home/ricola/Downloads/fpga/esden/test/nextpnr-xilinx/common/nextpnr.h:746
#11 0x000055555595033e in nextpnr_xilinx::Arch::pack (this=0x555555c418c0) at /home/ricola/Downloads/fpga/esden/test/nextpnr-xilinx/xilinx/pack.cc:912
#12 0x00005555557e8f83 in nextpnr_xilinx::CommandHandler::executeMain (this=0x7fffffffd100, ctx=std::unique_ptr<nextpnr_xilinx::Context> = {...})
    at /usr/include/c++/9.3.0/bits/unique_ptr.h:360
#13 0x00005555557e9492 in nextpnr_xilinx::CommandHandler::exec (this=0x7fffffffd100) at /usr/include/c++/9.3.0/bits/move.h:74
#14 0x00005555557dc125 in main (argc=<optimized out>, argv=<optimized out>) at /home/ricola/Downloads/fpga/esden/test/nextpnr-xilinx/xilinx/main.cc:91