#7671: No break spaces -----------------------------+---------------------------------------------- Reporter: zenzike | Owner: Type: bug | Status: new Priority: normal | Component: Compiler Version: 7.6.2 | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: None/Unknown | Blockedby: Blocking: | Related: -----------------------------+---------------------------------------------- I thought I was going mad when the following code wasn't compiling: {{{ {-# LANGUAGE UnicodeSyntax #-} {-# LANGUAGE RankNTypes #-} type F f = forall x . f x }}} GHC was producing the following error message: {{{ mad.hs:4:21 Illegal symbol '.' in type Perhaps you intended -XRankNTypes or similar flag to enable explicit-forall syntax: forall <tvs>. <type> }}} It turns out that I had somehow inserted a unicode no break space, character code `U+00a0`, in the line importing RankNTypes, just after the first `#`. Baffling. This begs the question: should GHC treat this unicode space as an ordinary space when the `UnicodeSyntax` extension is enabled? If not should there have been some warning that I had inserted this symbol in a language pragma? -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7671 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler