glade 3.18.3 (ubuntu 16) huge memory leak

Creating a window, adding some widgets, ie. toggle button, a viewport ..
then for example on the viewport (or even on the main window ) widget, select 'signals' and develop the "GtkWidget>" to show all the signals ...
immediately, the memory usage of the computer starts growing very fast, leading to an unstable system ( 4GB ram full , starting to swap, after a few minutes, if you leave glade at this state of displaying the signals listing )
it stops right when minimizing back the "GtkWidget->" signals section.
For what i've been testing, the memory leak happens for every widget's signals->Gtkwidget-> display.

computer : asus k73sv, quad core i7, nvidia gt540+intel hdgraphics , 4Gb ram
// system, fresh install :
Description: Ubuntu 16.04.2 LTS
Release: 16.04
// apt-cache policy glade
glade:
  Installed: 3.18.3-1
  Candidate: 3.18.3-1
  Version table:
 *** 3.18.3-1 500
        500 http://fr.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status