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Glasgow Haskell Compiler / GHC
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Ian Lynagh
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commit f002a461 Author: Simon Peyton Jones <simonpj@microsoft.com> Date: Tue Jan 17 12:15:26 2012 +0000 Do not combine dictionaries in the EvVarCache when simplEqsOnly is on This fixes Trac #5776; the background is in Note [Simplifying RULE lhs constraints] in TcSimplify