Seafile index update failure on deletion of files invalid on Windows

[iosifpeterfi]

Testcase description
While working on a shared library, somebody uploads a file/folder containing in it's name a character that is not supported by Windows. This file/folder is later deleted from the web client. Later, the files/folders pops back into the library.

Carried out from
Windows 7 Laptops, Seafile Clients 6.2.11

Date of Testing
2019-06-25

Description of SetUp
User
Windows 7 SP 1
Seafile Client 6.2.11 for Windows

Result of Testing
How to reproduce:

User creates a file/folder with a name that contains unsupported characters for windows (ie: 'Test?' - notice the question mark) through the web interface
User syncs the library with the client – file is added to the library index
User deletes the file/folder with the name that contains unsupported characters from the web interface
User syncs the library with the client.
Expected result: The client deletes the file from the library index
Actual result: The client does not delete the file from the library index
User closes the Keeper/Seafile client.
User modifies the worktree
User starts the Keeper/Seafileclient
The Keeper/Seafile client starts a scan dir process for the library
Expected result: Only the changes to the worktree committed and uploaded
Actual result: The changes to the worktree + the missing unsupported named file/folder are committed and uploaded

Workaround:
After step 3, have all the clients with access to the library run the following task on the library:
Right Click -> Resync this library

Permanent fix:
Apply a patch that handles the index file properly on deletion of files/folders with unsupported names on Windows.
00-seafile-index-update-fix.patch.txt