Unable to close a tab (ubuntu 18.04.1)

[Serge]

Ubuntu version affected: 18.04.1

Steps to reproduce:

1. Install guake via apt (guake version - 3.0.5-1)
2. Start guake by using launcher icon or by using terminal
3. Open a new tab by pressing ctrl+shift+t
4. Try to close that tab via right-click menu or just type "exit" in the shell running on the tab.

Expected: tab is closed and tab window is disappeared
Got: tab window is hanging forever

There's an error message from guake stderr:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/guake/guake_app.py", line 1534, in on_close_activate
    self.delete_tab(pagepos)
  File "/usr/lib/python3/dist-packages/guake/guake_app.py", line 1921, in delete_tab
    procs = self.notebook.get_running_fg_processes_tab(pagepos)
  File "/usr/lib/python3/dist-packages/guake/guake_notebook.py", line 75, in get_running_fg_processes_tab
    fdpty = terminal.get_pty().get_fd()
AttributeError: 'NoneType' object has no attribute 'get_fd'

Link to upstream issue: https://github.com/Guake/guake/issues/1186 - according to developers of guake, this issue should be now fixed. When the package for 18.04 will be updated?