我正在使用GCC 7.3.1，但也在coliru（我相信它是9.2.0版）上进行了测试。使用以下内容进行构建：

g++ -fsanitize=address -fno-omit-frame-pointer rai.cpp

这里是rai.cpp：

#include <iostream>
#include <unordered_map>

int main()
{
    try
    {
        struct MyComp {
            bool operator()(const std::string&, const std::string&) const {
                throw std::runtime_error("Nonono");
            }
        };

        std::unordered_map<std::string, std::string, std::hash<std::string>, MyComp> mymap;
        mymap.insert(std::make_pair("Hello", "There"));
        mymap.insert(std::make_pair("Hello", "There")); // Hash match forces compare
    } catch (const std::exception& e) {
        std::cerr << "Caught exception: " << e.what() << "\n";
    }
}

运行它会导致：

> ./a.out
Caught exception: Nonono

=================================================================
==72432==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 32 byte(s) in 1 object(s) allocated from:
...

Direct leak of 4 byte(s) in 1 object(s) allocated from:
...

Indirect leak of 60 byte(s) in 2 object(s) allocated from:
...

SUMMARY: AddressSanitizer: 96 byte(s) leaked in 4 allocation(s).

我看不到Visual C ++有任何内存泄漏（Microsoft (R) C/C++ Optimizing Compiler Version 19.24.28314 for x64）。

这是否会破坏unordered_map::insert（https://stackoverflow.com/a/11699271/1958315）的强大异常安全保证？这是GCC STL中的错误吗？

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