[issue40230] Itertools.product() Out of Memory Errors

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

> when I moved to testing on non-trivial graphs, I immediately had 
> Out of Memory Errors.

I'm going to hazard a guess that the input to product() was a graph traversal iterator that got trapped in an undetected cycle.  Feeding an infinite iterator into product() would eat all available memory, just as it would with list().

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<https://bugs.python.org/issue40230>
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