On 2019-06-10 7:56 p.m., Eric Mesa wrote:

> ERROR: link ermesa/.mozilla/firefox/n35gu0fb.default/bookmarkbackups/
> bookmarks-2019-06-09_679_I1bs5PtgsPwtyXvcvcRdSg==.jsonlz4 -> ermesa/.mozilla/
> firefox/n35gu0fb.default/bookmarkbackups/
> bookmarks-2019-06-08_679_I1bs5PtgsPwtyXvcvcRdSg==.jsonlz4 failed: No such file 
> or directory
> 

Are you by any chance using btrfs property to change RO snapshots RW?
That must *never* be done to parent subvolumes, on either sending or
receiving side.  (Really probably not a good idea to do at all outside
of very special development/testing cases, but is guaranteed to make of
mess of send/receive.)