Internal Compiler Error on GCC (-fPIC -std=c++17 -Ox)

[Kretikus]

• Compiler Used: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
• Operating System: Debian 11.7
• Architecture (64bit):

Chaiscript 6.1.0 (from vcpkg)

Expected Behavior

It compiles

Actual Behavior

gcc crashes with internal compiler error as soon as some Optimization Flag is given

Minimal Example to Reproduce Behavior

main.cpp:

#include <chaiscript/chaiscript.hpp>
int main(int argc, char* argv[])
{
chaiscript::ChaiScript chai;
}

compile with:
g++ -I_path to chaiscriptinclude_ main.cpp -std=c++17 -DNDEBUG -fPIC -O3

/home/qs-master/vcpkg/installed/x64-linux/include/chaiscript/dispatchkit/bootstrap.hpp: In substitution of 'template<class T, class Q> chaiscript::Proxy_Function chaiscript::fun(T&&, const Q&) [with T = <missing>; Q = <missing>]':
/home/qs-master/vcpkg/installed/x64-linux/include/chaiscript/dispatchkit/bootstrap.hpp:148:16:   required from 'void chaiscript::bootstrap::bootstrap_pod_type(const string&, chaiscript::Module&) [with T = double; std::string = std::__cxx11::basic_string<char>]'
/home/qs-master/vcpkg/installed/x64-linux/include/chaiscript/dispatchkit/bootstrap.hpp:470:47:   required from here
/home/qs-master/vcpkg/installed/x64-linux/include/chaiscript/dispatchkit/bootstrap.hpp:148:16: internal compiler error: Segmentation fault
  148 |       m.add(fun(&parse_string<T>), "to_" + name);
      |             ~~~^~~~~~~~~~~~~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.