Two questions about the method 'readdir' and server crash

[smallcham]

i'm writing a fs it's base on a netdisc, now i have two problems, I hope you can take some time to answer:
the first is when call readdir method, i ll request netdisc to read file list, but always lose some file in display, around 23, the total is 37. i printed filename before call method 'pyfuse3.readdir_reply' , the file list is complete, but in terminal is always lose some files, i don't know what happend, maybe i usage is wrong, there is my code snippet:

async def readdir(self, fh, start_id, token):
        if start_id == -1:
            return
        else:
            f = FileMgr.get_from_fs_id(fh)
        files = self.fs.dir_cache('/' if not f else f.path, pyfuse3.ROOT_INODE if not f else f.fs_id)
        for file in files:
            pyfuse3.readdir_reply(token, file.filename_bytes, await self.getattr(file.fs_id, None), -1)

another question is when i mounted fs for nearly ten minutes , the server was always crash，this is error log

"Cannot convert coroutine to pyfuse3.EntryAttributes
2020-04-16 17:08:46.687 MainThread: [pyfuse3] Calling fuse_session_destroy
2020-04-16 17:08:46.687 MainThread: [pyfuse3] Calling fuse_session_unmount"

don't have enough error info , i can't tace back to the point of error.

last, the pyfuse is a very useful lib, thankyou.

[Nikratio]

Thanks for your interest in pyfuse3! As far as I can tell, this is a question about how to use fuse rather than a bug report. Could you please send your question to the FUSE mailing list (https://lists.sourceforge.net/lists/listinfo/fuse-devel), instead of using the issue tracker? I'd like to reserve use of the latter to actually track issues and not use it for discussion.

Thanks!

[Nikratio]

...as for your question, the problem is most likely that you don't check the return value of readdir_reply(), cf http://www.rath.org/pyfuse3-docs/fuse_api.html#pyfuse3.readdir_reply