[commit: ghc] wip/D2128's head updated: Implement the state hack without modifiyng OneShotInfo (a48ebcc)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

Branch 'wip/D2128' now includes:

     7f71dbe Bump haddock submodule
     81aa3d1 Reduce use of instances in hs-boot files
     871f684 Define NameSet.intersectFVs
     7319b80 Tighten up imports, white space
     353d8ae SCC analysis for instances as well as types/classes
     61191de Fix two buglets in 17eb241 noticed by Richard
     cdcf014 Tighten up imports on TcTyClsDecls
     687c778 Kill unnecessary varSetElemsWellScoped in deriveTyData
     62943d2 Build a correct substitution in dataConInstPat
     55b1b85 Accept tcrun045 output
     2e33320 Rename FV related functions
     98a14ff Point to note about FV eta-expansion performance
     7c6585a Remove mysterious varSetElemsWellScoped in tidyFreeTyCoVars
     8c33cd4 testsuite: Bump max bytes used of T4029
     f02af79 Improve the behaviour of warnIf
     edf54d7 Do not use defaulting in ambiguity check
     9421b0c Warn about simplifiable class constraints
     251a376 Test Trac #3990
     26a1804 wibble to simplifiable
     24d3276 A little more debug tracing
     c2b7a3d Avoid double error on out-of-scope identifier
     970ff58 Simplify defaultKindVar and friends
     6ad2b42 Refactor free tyvars on LHS of rules
     ed4a228 Fix typos: alpah -> alpha
     4221cc2 Typo: veraibles -> variables
     a9076fc Remove unused tyCoVarsOfTelescope
     0f96686 Make benign non-determinism in pretty-printing more obvious
     03006f5 Get rid of varSetElemsWellScoped in abstractFloats
     28503fe deriveConstants: Fix nm-classic error message
     e8c04d4 Testsuite: Delete test for deprecated "packedstring"
     dadf82d Testsuite: fixup lots of tests
     2a83713 Testsuite: delete Roles9.stderr
     fd5212f Testsuite: delete unused concurrent/prog002/FileIO.hs
     c9bcaf3 Kill varSetElemsWellScoped in quantifyTyVars
     e68195a RTS: Add setInCallCapability()
     95f9334 GHCi: use real time instead of CPU time for :set -s
     d396996 Doc improvement for ApplicativeDo
     24864ba Use __builtin_clz() to implement log_2()
     0712f55 Just comments & reformatting
     2dc5b92 Kill varSetElems in TcErrors
     94320e1 Kill varSetElems try_tyvar_defaulting
     f13a8d2 Kill varSetElems in markNominal
     a48ebcc Implement the state hack without modifiyng OneShotInfo