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We started with a blacklist to match against while(1), while(true), for(;;), etc, but we eventually found an eslint plugin (goedel.js) that nicely tells you if the code contains an infinite loop or recursion.

[flafla2]

That plug-in certainly won’t cover all cases of infinite loops, or they just solved the halting problem :)

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Hmmmm maybe you're thinking of entscheidungsproblem.js? This is a fork of that.