&gt;Justification and use-case starts at <a href="https:&#x2F;&#x2F;github.com&#x2F;ghc&#x2F;ghc&#x2F;commit&#x2F;46a03fbec6a02761db079d1746532565f34c340f#diff-02e7842997523ff8a5ad0312df2edfe2L12435" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;ghc&#x2F;ghc&#x2F;commit&#x2F;46a03fbec6a02761db079d1746...</a> if anyone was wondering.