Method _on_error_fd_closer

Lib/subprocess.py:1380–1397

Helper to ensure file descriptors opened in _get_handles are closed

(self)

    @contextlib.contextmanager
    def _on_error_fd_closer(self):
        """Helper to ensure file descriptors opened in _get_handles are closed"""
        to_close = []
        try:
            yield to_close
        except:
            if hasattr(self, '_devnull'):
                to_close.append(self._devnull)
                del self._devnull
            for fd in to_close:
                try:
                    if _mswindows and isinstance(fd, Handle):
                        fd.Close()
                    else:
                        os.close(fd)
                except OSError:
                    pass
            raise

    if _mswindows:
        #