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1/3 Yesterday a test of an unreleased advanced order type encountered a bug which resulted in the order's prices being matched against the wrong side of the book. Some clients bought from the tester at $8000 and others sold at $12000 without clearing the intervening liquidity.

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So, because a bug is discovered in a limited production beta once every few years it means there’s no testing? Our new order types undergo thousands of automated and human tests for months before they make it to prod. You can’t find all the bugs all the time.

8:45 PM · Sep 14, 2019Twitter for iPhone

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I 2nd that buuuuullshit!!

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So you are rolling back the trades that resulted from your bug?

Jesse Powell

@jespow

Sep 14, 2019

No. A few lucky traders will keep their sells at $12000 and buys at $8000, and we will reimburse the beta tester out of pocket.

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Jesse Powell

@jespow

Sep 14, 2019

No, that’s not what I’m saying. If by “shitty” you mean had < 100% coverage of every possible edge case in the universe then you’d be right but that’s not a reality of eng. Test outcomes are always situational, and tests cannot be perfectly imagined for every possible edge case.