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Simon Peyton Jones authored
I dug more into how #14158 started working. I temporarily reverted the patch that "fixed" it, namely commit a6c448b4 Author: Simon Peyton Jones <simonpj@microsoft.com> Date: Mon Aug 28 17:33:59 2017 +0100 Small refactor of getRuntimeRep Sure enough, there was a real bug, described in the new TcExpr Note [Visible type application zonk] In general, syntactic substituion should be kind-preserving! Maybe we should check that invariant... (cherry picked from commit 2c133b67)
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