I can't reproduce this on Files 3.26.3-0ubuntu4 on Ubuntu 18.04 so am assuming that the fix was released sometime before then. Please change the status to New if this is not the case.
** Changed in: nautilus (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/1730528 Title: Dragging a folder to create a bookmark makes the folder unreadable Status in nautilus package in Ubuntu: Fix Released Bug description: When dragging a folder to create a bookmark on the left panel, deletes the folder and makes the folder unreadable. The folder cannot be found even in trash, you can see the folders until the next restart but in properties it shows unreadable ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: nautilus 1:3.26.0-0ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 Uname: Linux 4.13.0-16-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue Nov 7 00:25:18 2017 InstallationDate: Installed on 2017-10-23 (14 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) SourcePackage: nautilus UpgradeStatus: Upgraded to artful on 2017-11-03 (3 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1730528/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp