Steps to reproduce:
1. Open a zip file.
2. Mount an sftp folder using the Nautilus 2.30.1.
3. Select multiple files in the zip window in File Roller
and drag them to the sftp folder.
4. file-roller crashes with a signal 139 and reports the
following output on the command line:
zsh: segmentation fault file-roller
Let me know of anything else I can do to help. It's not a huge issue
as I can extract to a local file first. If I get time maybe I'll dig into
the code, but I've never done any GTK development before.