[Python-Dev] Issue 19332: Guard against changing dict during iteration

[R. David Murray]

On Wed, 06 Nov 2013 23:34:22 +1100, Steven D'Aprano <steve at pearwood.info> wrote:
> On Tue, Nov 05, 2013 at 08:38:09PM -0800, Ethan Furman wrote:
> 
> > http://bugs.python.org/issue19332
> 
> Duplicate of this: http://bugs.python.org/issue6017
> 
> The conclusion on that also was that it is not worth guarding against 
> such an unusual circumstance.

If I remember correctly (and I may not) the size-change guards were
added because without them there were certain cases that could
either segfault or result in an infinite loop.

--David