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Thomas Miedema authored
This fixes validate. 37445780 (D202) mentions: "This patch also wires-in Maybe data type". A conflicting definition of a wired-in type in a .hsig file doesn't seem to cause compilation to fail. This is probably a bug, but a small one. Since SPJ in ffc21506 swept this under the rug, by removing `data Bool a b c d = False` from tcfail220.hsig, I'm going to do the same here. D1098 touches these files, so ezyang can decide whether this problem warrants fixing when doing a rebase. Differential Revision: https://phabricator.haskell.org/D1208
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