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
20068	calling QueryDict.update with self causes an infinite loop	anonymous	nobody	"In the following example:

q = QueryDict()
q.update(q)

the second line will cause an infinite loop. (Obviously there's a strong answer you just shouldn't do this...)

Regular python dictionaries appear to do nothing when updated with themselves. The appropriate fix would probably be to change the function update() in utils/datastructures.py around line 426-467 so that
other_dict = args[0]
if other_dict is self: return

(I don't have a github account so can't submit this change directly - sorry!) Making an appropriate test-case is less obvious, since it would involve detecting when the existing code runs forever."	Bug	closed	Utilities	dev	Normal	needsinfo			Unreviewed	0	0	0	0	0	0