Server crashes when "GET / HTTP/," is sent.

#5 0x00007ffff7e0809e in __cxxabiv1::__cxa_throw ( obj=obj@entry=0x555555759bf0, tinfo=0x7ffff7f34238 , dest=0x7ffff7e1df10 std::invalid_argument::~invalid_argument()) at /build/gcc/src/gcc/libstdc++-v3/libsupc++/eh_throw.cc:95 #6 0x00007ffff7dfe501 in std::__throw_invalid_argument ( __s=0x555555704037 "stof") at /build/gcc/src/gcc/libstdc++-v3/src/c++11/functexcept.cc:74 #7 0x00005555556a463c in __gnu_cxx::__stoa<float, float, char> ( __convf=0x7ffff7a7e730 , __name=0x555555704037 "stof", __str=0x555555759f20 ",", __idx=0x0) at /usr/include/c++/10.1.0/ext/string_conversions.h:83 #8 0x000055555569609f in std::__cxx11::stof (__str=",", __idx=0x0) at /usr/include/c++/10.1.0/bits/basic_string.h:6573 --Type for more, q to quit, c to continue without paging--