Subsequent editing sessions make QGIS unresponsive

[antoniusz]

On subsequent editing (and not using autotrace plugin) more then 9 save in 1 session make qgis saving slow down (makes unresponsive) for 1-3 minutes. when i hit crt+c on the terminal i got:

^CTraceback (most recent call last):
File "/home/toni/.qgis2/python/plugins/autoTrace/autoTrace.py", line 101, in toggle
QObject.disconnect(layer,SIGNAL("editingStopped()"),self.toggle)
KeyboardInterrupt

The same bug reported also for other plugins:

https://hub.qgis.org/issues/9291
https://hub.qgis.org/issues/9229

Uninstalling autotrace plugin, i cannot reproduce this behavior.