Re: Bug in fs::copy / fs::copy_file

I think I found a bug in MINGW, gcc in the filesystem library:

MINGW v. 8.0

-- The C compiler identification is GNU 10.2.0

-- The CXX compiler identification is GNU 10.2.0

-- Check for working C compiler: P:/MSYS2/mingw64/bin/gcc.exe

-- Check for working C compiler: P:/MSYS2/mingw64/bin/gcc.exe -
works

trying to run:

```

#include <iostream>
#include <fstream>
#include <filesystem>

namespace fs = std::filesystem;

constexpr auto * f1 ="C:\\TEMP\\fred_test.txt";
constexpr auto * f2 ="C:\\TEMP\\fred_test.txt~";

void create_file(char const* p){
std::ofstream ofs1{p};
}

int main() {
try{
fs::remove(f1);
fs::remove(f2);
create_file(f1);
create_file(f2);
fs::copy_file(f1, f2, fs::copy_options::overwrite_existing);
std::cout << "success" << std::endl;
} catch (fs::filesystem_error const& fe) {
std::cout << fe.what() << std::endl;
}
}

```

Gives the following output:

```

filesystem error: cannot copy file: File exists
[C:\TEMP\fred_test.txt] [C:\TEMP\fred_test.txt~]

```

With msvc:

```

success

```

Running CMake with: P:\MSYS2\mingw64\bin\cmake.exe
-DCMAKE_BUILD_TYPE=Debug -G "CodeBlocks - MinGW Makefiles"
C:\Users\Febbe\CLionProjects\test_fs

```

cmake_minimum_required(VERSION 3.17)
project(test_fs)
set(CMAKE_CXX_STANDARD 20)
add_executable(test_fs main.cpp)

```

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