#9585: Note about semantics of (!!) is not specific enough, if it's correct -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: | Version: 7.9 libraries/base | Keywords: Resolution: fixed | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: Documentation bug | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by nomeata): * status: new => closed * resolution: => fixed Comment: After staring at the code for a few minutes, I also don’t see a difference – both evaluate `n` first, and then go down the list in the obvious manner. Some archaeology reveals: ceb68b9118fa883e88abfaa532fc78f6640cf17f changed the prelude definition, and before the change, `!!` would evaluate the list before the number. So you are right, the comment is wrong. I just removed it. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9585#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler