#7727: Nonsense evaluation: sequence [] = [] -----------------------------+---------------------------------------------- Reporter: drb226 | 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: -----------------------------+---------------------------------------------- {{{ $ ghci-7.6.2 GHCi, version 7.6.2: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done.
sequence [] [] :t it it :: [()] sequence [] :: [()]
<interactive>:4:1: Couldn't match type `[a0]' with `()' Expected type: [()] Actual type: [[a0]] In the return type of a call of `sequence' In the expression: sequence [] :: [()] In an equation for `it': it = sequence [] :: [()] }}} Wat. Where on earth did ghci get the idea that {{{ sequence [] = [] }}}? -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7727 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler