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Formula gate with invalid formula is seen as time dependent #449

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Strilanc opened this issue Jan 4, 2020 · 1 comment

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Strilanc commented Jan 4, 2020

Causes CPU usage to stay non-zero

https://algassert.com/quirk#circuit=%7B%22cols%22%3A%5B%5B%7B%22id%22%3A%22Z%5Eft%22%2C%22arg%22%3A%22BAD%22%7D%2C%7B%22id%22%3A%22Z%5Eft%22%2C%22arg%22%3A%22BAD%22%7D%2C%7B%22id%22%3A%22Z%5Eft%22%2C%22arg%22%3A%22BAD%22%7D%2C%7B%22id%22%3A%22Z%5Eft%22%2C%22arg%22%3A%22BAD%22%7D%2C%7B%22id%22%3A%22Z%5Eft%22%2C%22arg%22%3A%22BAD%22%7D%2C%7B%22id%22%3A%22Z%5Eft%22%2C%22arg%22%3A%22BAD%22%7D%5D%5D%7D

Strilanc added this to the v2.4 milestone

Contributor

marwahaha commented Oct 15, 2020

It seems that a bad formula is a custom disable reason of a gate.
Could a disabled gate set "_hasNoEffect" or stableDuration to Infinity?

I've attached a PR that offers one approach, but it may not be the best one.

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