[commit: ghc] wip/T15809's head updated: Finally, validate-clean (fecafee)

[git at git.haskell.org]

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

Branch 'wip/T15809' now includes:

     255d2e3 Fix embarrassing, egregious bug in roles of (->)
     74ed9c1 Actually fail in failIfEmitsConstraints
     1f72a1c Don't lint erroneous programs.
     a78e23b Lower precedence for {-# UNPACK #-}
     614028e Data.Maybe: add callstack for fromJust (Trac #15559)
     fcd919f users-guide: Fix formatting of eventlog format documentation
     695f1f2 hadrian: build ghc-iserv-prof in addition to ghc-iserv
     1c92f19 Add built-in syntax suggestions, and refactor to allow library use
     f877d9c Move eta-reduced coaxiom compatibility handling quirks into FamInstEnv.
     efb3145 users-guide: Update link to Safe Coercions paper
     c3c552d Bump time submodule
     c088137 base: Misc haddock fixes
     118fca7 base: Improve haddocks for Functor
     5f81952 rts: Allow output filename of eventlog to be given by command-line
     6bb8aaa rts: Add FALLTHROUGH macro
     2c959a1 Add Int8# and Word8#
     1a3b9bd Fix for Trac #15611: Scope errors lie about what modules are imported.
     72b8234 Fix #15859 by checking, not assuming, an ArgFlag
     5693ddd Actually add test for #15859.
     7189469 integer-gmp: Fix TBA in changelog
     648b0c2 Bump directory submodule to 1.3.3.1
     406978c CircleCI: Build DWARF-enabled Linux bindists
     f424515 [LlvmCodeGen] Fixes for Int8#/Word8#
     802ce6e Revert "Fix for T14251 on ARM"
     39cd12b Revert "Multiple fixes / improvements for LLVM backend"
     82a5c24 Revert "CircleCI: Build DWARF-enabled Linux bindists"
     932cd41 testsuite: Save performance metrics in git notes.
     63a8170 Fix #15845 by defining etaExpandFamInstLHS and using it
     400f3ed GHCi does not need a main function
     aa88285 iserv: Fix typo in cabal file
     b337906 Ignore .gdb_history files
     98f8e1c Respect naming conventions in module RnUnbound.hs in fix for #15611
     13ff0b7 Fix #15594 (--abi-hash with Backpack sometimes fails)
     d30352a Remove StgBinderInfo and related computation in CoreToStg
     86ee74d compareByPreference: handle the integer-gmp vs -simple case
     89bf7d5 Correct link to GHC API in docs index.
     0f2ac24 circleci: Disable pushing of test metrics if not validating upstream
     5b98a38 Make `UniqDSet` a newtype
     89fa34e hadrian: build ghc-iserv-dyn
     eb46345 Fix a bug in SRT generation (#15892)
     fe05764 Comments only, about polykinded TyConApps
     0ce66be Comments adding to the fix for Trac #15859
     ae2c9b4 Smarter HsType pretty-print for promoted datacons
     4efd1b4 bump haddock submodule
     a50a59a More efficient, non-allocating unsafeLookupStaticPtr
     32e7738 Add missing stderr file for Trac #15898
     2683496 Tc-tracing, and order of arguments only
     2fa5bf1 WIP on using level numbers for generalisation
     8707f2d More progress on using level numbers for gen
     d0772e7 Further work on TyCon generalisation
     304d65f Further progress
     dfd6617 More progress
     1284033 More progress
     6ddf2d1 More progress
     9a902e8 Comemnts only
     a7a6672 Finally done
     0cd583c Comments and alpha-renaming
     26c2ec3 Comments only
     3f214ea Progress
     b8d7bee Combine kcImplicitTKBndrs and tcImplicitTKBndrs
     9f41010 Get rid of kcLHsQTyVarBndrs
     4d6a157 Start to eliminate tcFamTyPats
     e547695 More progress on tcFamTyPats
     9a854cc Wibbles
     255ae41 Much more progress on tcFamTyPats
     461e8dc Data family instances working, I think
     c724f92 Print tycon arity in -ddump-types
     1b8289d More progress with data instances
     99efd58 Wibbles
     862873e More progress on reporting unbound variables
     3a85772 Nearly there...
     d027b8c Better validity checks, simplification
     fecafee Finally, validate-clean