C++ experimental/filesystem remove_all

Question

I want to remove folder with subfolders and files in C++17. I'm using experimental/filesystem

namespace filesys = std::experimental::filesystem;
...

uintmax_t n = filesys::remove_all("tmp");
cout << "Deleted " << n << " files or directories\n";

but when i run this code, program throw exception

terminate called after throwing an instance of 'std::experimental::filesystem::v1::__cxx11::filesystem_error'

what(): filesystem error: cannot remove all: Directory not empty [tmp]

Aborted

Using compier g++ 5.4.0

Documentation says:

Deletes the contents of p (if it is a directory) and the contents of all its subdirectories, recursively, then deletes p itself as if by repeatedly applying the POSIX remove. Symlinks are not followed (symlink is removed, not its target)

Is there any problem with my code?

Answer 1

The case of this error being thrown, is likely an issue in the implementation for gcc 5.4: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71313

Using a more recent version of gcc will not throw such an error. For instance, this is not thrown for an empty remove_all call on gcc 7.4.0.