[Bug 48569] New: Infinite drag & drop loop in WinSCP

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48569

Bug ID: 48569
           Summary: Infinite drag & drop loop in WinSCP
           Product: Wine
           Version: 5.0
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 66395
  --> https://bugs.winehq.org/attachment.cgi?id=66395
Wine command line output

I'm using Ubuntu 18.04 LTS and Wine 5.0 from the official WineHQ repository.
The Wine prefix is clean.

Steps to reproduce:

1. Get the portable version of WinSCP (currently
https://winscp.net/download/WinSCP-5.15.9-Portable.zip).
2. Extract it, execute WinSCP.exe and connect to a SFTP server.
3. In the remote server window try to drag & drop a remote sample file (like
/tmp/test.txt) into a remote folder (like /tmp/testdir).
4. The Move path dialogue appears flickering in an indefinite loop until WinSCP
crashes.

I've been in contact with the WinSCP developer Martin Přikryl about this issue.
We've done quite extensive testing with various debug builds and he came to the
conclusion, that Wine creates an infinite drag & drop loop after releasing the
mouse button causing WinSCP to crash. This behaviour does not happen on native
Windows.

Attached is the command line output of wine.