(gdb) bt 20
#0  0x00007ffff5cc4067 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007ffff5cc5448 in __GI_abort () at abort.c:89
#2  0x00007ffff68095ec in __gnu_cxx::__verbose_terminate_handler () at /home/brain/gcc/libstdc++-v3/libsupc++/vterminate.cc:95
#3  0x00007ffff68139c6 in __cxxabiv1::__terminate(void (*)()) () at /home/brain/gcc/libstdc++-v3/libsupc++/eh_terminate.cc:48
#4  0x00007ffff6812aa9 in __cxa_call_terminate (ue_header=ue_header@entry=0x7fffd8230570) at /home/brain/gcc/libstdc++-v3/libsupc++/eh_call.cc:54
#5  0x00007ffff68133e1 in __gxx_personality_v0 () at /home/brain/gcc/libstdc++-v3/libsupc++/eh_personality.cc:685
#6  0x00007ffff62671df in _Unwind_RaiseException_Phase2 () at /home/brain/gcc/libgcc/unwind.inc:64
#7  0x00007ffff6267861 in _Unwind_RaiseException () at /home/brain/gcc/libgcc/unwind.inc:136
#8  0x00007ffff6813cb7 in __cxxabiv1::__cxa_throw (obj=obj@entry=0x7fffd8230590, tinfo=0x8b6be0 <typeinfo for std::system_error@@GLIBCXX_3.4.11>, tinfo@entry=0x7ffff6b265f0 <typeinfo for std::system_error>, dest=0x40b060 <std::system_error::~system_error()@plt>,
    dest@entry=0x7ffff683cd90 <std::system_error::~system_error()>) at /home/brain/gcc/libstdc++-v3/libsupc++/eh_throw.cc:90
#9  0x00007ffff680c21a in std::__throw_system_error (__i=35) at /home/brain/gcc10/x86_64-pc-linux-gnu/libstdc++-v3/include/system_error:214
#10 0x000000000043cd43 in std::__shared_mutex_pthread::lock() ()
#11 0x000000000043cdfe in std::shared_mutex::lock() ()
#12 0x000000000048904f in std::unique_lock<std::shared_mutex>::lock() ()
#13 0x00000000004678e1 in std::unique_lock<std::shared_mutex>::unique_lock(std::shared_mutex&) ()
#14 0x0000000000442947 in aegis::core::remove_channel(aegis::snowflake) ()
#15 0x000000000044e9f6 in aegis::core::ws_channel_delete(nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long, unsigned long, double, std::allocator, nlohmann::adl_serializer> const&, aegis::shards::shard*) ()