id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 19340 django.forms.Field is not thread-safe anonymous nobody "django.forms.Field has the 'creation_counter' attribute which is incremented when an instance of django.forms.Field (or one of its subclasses) is created. I DO understand that it's a bit unusual to create forms in the runtime, so this must not be a big issue (or not a bug at all), but it should be documented somewhere. {{{ In [231]: from django import forms In [232]: forms.Field.creation_counter Out[232]: 0 In [233]: from threading import Thread In [234]: def f(): .....: for x in xrange(10000): .....: forms.Field() .....: In [235]: ths = [Thread(target=f) for x in xrange(4)] In [236]: for t in ths: t.start() In [237]: for t in ths: t.join() In [240]: forms.Field.creation_counter Out[240]: 35409 }}}" Bug closed Forms 1.4 Normal invalid thread-safe Unreviewed 0 0 0 0 0 0