but i bet dollars to donuts that someone out there relied on the instability and this will break things for themhttps://twitter.com/mathias/status/1146067251302244353 …
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It's super hard to rely on instability, though. What do you even rely on, exactly? With unstable sort, you could get *any* order for elements that compare equal, and it would certainly have differed between implementations. It's not a problem in practice.
any bug or implementation difference can be a feature for _someone_
agreed that it shouldn’t be a problem in practice for almost everyone
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