<p><pre><code>  How did they bypass the review process?
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You wouldn&#x27;t have to - you could wait for an opportunity to slip it into a huge, mundane change.<p>For example, changing the repository from Mercurial to Git. Splitting or combining two repositories. Moving lots of files between directories. Running an autoformatter over the entire codebase. Something like that.<p>I&#x27;d wager there aren&#x27;t many reviewers with the patience and attentiveness to spot 1 evil change among 1000 trivial changes.