I'm getting these warnings relating to the user manual. They seem non-fatal, but are alarming. Simon reading sources... [ 66%] ghc looking for now-outdated files... none found pickling environment... done checking consistency... /5playpen/simonpj/HEAD-2/docs/users_guide/ghc.rst:: WARNING: document isn't included in any toctree done writing... ghc.1 { WARNING: file compiler/simplCore/SimplCore.hs, line 600 Simplifier bailing out after 4 iterations [6069, 1479, 780, 43] Size = {terms: 5,210, types: 10,459, coercions: 2,136} Interesting! A join var that isn't let-no-escaped [$j_snPt] } build succeeded, 1 warning. reading sources... [100%] glasgow_exts WARNING: file compiler/simplCore/SimplEnv.hs, line 528 go_Xn2R WARNING: file compiler/simplCore/SimplEnv.hs, line 528 go_Xn2R looking for now-outdated files... none found pickling environment... done checking consistency... /5playpen/simonpj/HEAD-2/docs/users_guide/ghc.rst:: WARNING: document isn't included in any toctree done preparing documents... done