Are you using C++11 or later?
The original operator new() declarations in C++98
throwing: void* operator new (std::size_t size) throw (std::bad_alloc); nothrow: void* operator new (std::size_t size, const std::nothrow_t& nothrow_value) throw(); placement: void* operator new (std::size_t size, void* ptr) throw();
Have been changed in C++11 to use noexcept keyword:
throwing: void* operator new (std::size_t size); nothrow: void* operator new (std::size_t size, const std::nothrow_t& nothrow_value) noexcept; placement: void* operator new (std::size_t size, void* ptr) noexcept;
from
Different exception specifier with g++ 6.2
declaration of 'void* operator new [](size_t)' has a different exception specifier
原文：https://www.cnblogs.com/fengtai/p/12216504.html