[commit: ghc] wip/T15809's head updated: More wibbles (a58cbf1)

[git at git.haskell.org]

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

Branch 'wip/T15809' now includes:

     b2950e0 Implement late lambda lift
     929363b configure: Use LLVM 7.0
     0a126a3 distrib/configure: Set RanlibCmd
     937d484 users guide: Clarify meanings of -g<n> flags
     ee03ac4 Bump containers submodule
     c2be6d5 Bump text submodule
     f61f71c Revert "Simplify 'ExtBits' in the lexer"
     7e7e846 Revert "'DynFlag'-free version of 'mkParserFlags'"
     ad2d761 Fix unused import warning
     509d5be [TTG: Handling Source Locations] Foundation and Pat
     6a70acf CircleCI: Clean up docker image
     bba2b9b Revert "Fix uninformative hp2ps error when the cmdline contains double quotes"
     4ac7a94 CircleCI: More cleanup
     9e47dd3 Remove unused declarations in MarkWeak.h
     8a6aa87 Revert "Remove redundant check in cgCase"
     df570d9 Fix build on darwin
     c216a13 Tc-tracing, and order of arguments only
     ec716ec WIP on using level numbers for generalisation
     7cc4706 More progress on using level numbers for gen
     1394ef8 Further work on TyCon generalisation
     ccdcb58 Further progress
     ea20832 More progress
     fbb64e4 More progress
     069307d More progress
     e5492e6 Comemnts only
     2f02df6 Finally done
     5104ded Comments and alpha-renaming
     9980257 Comments only
     326f87a Progress
     7c61052 Combine kcImplicitTKBndrs and tcImplicitTKBndrs
     0ba23e8 Get rid of kcLHsQTyVarBndrs
     a787fbb Start to eliminate tcFamTyPats
     74f5b0e More progress on tcFamTyPats
     1651c0a Wibbles
     f147f82 Much more progress on tcFamTyPats
     98331d5 Data family instances working, I think
     1288a96 Print tycon arity in -ddump-types
     412a735 More progress with data instances
     95544de Wibbles
     3ff0120 More progress on reporting unbound variables
     df8140d Nearly there...
     e49adfb Better validity checks, simplification
     dc1457c Finally, validate-clean
     82dfe01 Simplify typing of associated family instances
     a2b8905 Wibbles
     7b20763 More wibbles
     3baf793 More progress in tcFamTyPats
     517805d Wibbles
     b728b32 Wibble, to fix build
     832f058 Yet more on family-instance checking
     df516f2 Wibbles to checkConsistentFamInst
     1c686e6 More wibbles on checkConsistentFamInst
     7f9e428 More wibbles
     129bf71 More wibbles to data families
     a58cbf1 More wibbles