dnsdist 1.9.0-rc1 crash

(lldb) bt all
* thread #1, name = 'dnsdist', stop reason = signal SIGBUS
  * frame #0: 0x000035144c07ac36 dnsdist`ServerPolicy::ServerPolicy(ServerPolicy const&) [inlined] std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::basic_string(this=Summary Unavailable, __str="firstAvailable") at string:899:20
    frame #1: 0x000035144c07ac24 dnsdist`ServerPolicy::ServerPolicy(this=0x00003af67aa62038, (null)=0x0000351c6c797900) at dnsdist-lbpolicies.hh:32:7
    frame #2: 0x000035144c07aa43 dnsdist`LuaContext::PushedObject LuaContext::Pusher<ServerPolicy, void>::push<ServerPolicy&>(state=0x00003af67aa12708, value=0x0000351c6c797900) at LuaContext.hpp:1647:37
    frame #3: 0x000035144c07a8f5 dnsdist`void LuaContext::setTable<ServerPolicy, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>&, ServerPolicy&>(state=0x00003af67aa12708, (null)=Globals, index="firstAvailable", data=0x0000351c6c797900) at LuaContext.hpp:1004:23
    frame #4: 0x000035144bfd4a19 dnsdist`setupLuaBindings(LuaContext&, bool, bool) [inlined] void LuaContext::writeVariable<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>&, ServerPolicy&>(this=<unavailable>, data=<unavailable>, data=<unavailable>) at LuaContext.hpp:737:9
    frame #5: 0x000035144bfd4a05 dnsdist`setupLuaBindings(luaCtx=<unavailable>, client=<unavailable>, configCheck=<unavailable>) at dnsdist-lua-bindings.cc:90:12
    frame #6: 0x000035144c1d5423 dnsdist`setupLua(luaCtx=0x000035144c38cee8, client=<unavailable>, configCheck=true, config="/usr/local/etc/dnsdist.conf") at dnsdist-lua.cc:3399:3
    frame #7: 0x000035144c2f1a08 dnsdist`main(argc=5, argv=0x0000351c6c798488) at dnsdist.cc:3257:7
    frame #8: 0x0000351c948f18ca libc.so.7`__libc_start1(argc=5, argv=0x0000351c6c798488, env=0x0000351c6c7984b8, cleanup=<unavailable>, mainX=(dnsdist`main at dnsdist.cc:3181)) at libc_start1.c:157:7
    frame #9: 0x000035144bd5a38d dnsdist`_start at crt1_s.S:83