kMeans: random crashes

[ajdapretnar]

k-Means sometimes chooses to cease working. Connect File (iris.tab) with k-Means. Sometimes the widget doesn't load the data and stops working.

I didn't notice anything special in the log, but I'm adding it anyway.

orange-canvas --clear-widget-settings
Warning: QApplication was created before pyqtgraph was imported; there may be problems (to avoid bugs, call QApplication.setGraphicsSystem("raster") before the QApplication is created).
couldn't create image from  "EC2EE3FB7160215B.jpg"
couldn't create image from  "EC2EE3FB7160215B.jpg"
Could not resolve property : gridpattern
Could not resolve property : gridpattern
libpng warning: iCCP: known incorrect sRGB profile
couldn't create image from  "EC2EE3FB7160215B.jpg"
couldn't create image from  "EC2EE3FB7160215B.jpg"
Could not resolve property : gridpattern
/Users/ajda/orange/orange3-educational/orangecontrib/educational/widgets/owkmeans.py:6: RuntimeWarning: Loaded module AnyQt._backport as a substitute for PyQt4
  from PyQt4.QtCore import pyqtSlot, QThread, Qt, pyqtSignal, QObject
/Users/ajda/orange/orange3-educational/orangecontrib/educational/widgets/owkmeans.py:6: RuntimeWarning: Loaded module AnyQt._backport.QtCore as a substitute for PyQt4.QtCore
  from PyQt4.QtCore import pyqtSlot, QThread, Qt, pyqtSignal, QObject
/Users/ajda/orange/orange3-educational/orangecontrib/educational/widgets/owkmeans.py:7: RuntimeWarning: Loaded module AnyQt._backport.QtGui as a substitute for PyQt4.QtGui
  from PyQt4.QtGui import QSizePolicy
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
js: Uncaught ReferenceError: fixupPythonObject is not defined

[PrimozGodec]

I can not reproduce it. I know it is an old issue but do you have any idea how to reproduce it?