#14626: No need to enter a scrutinised value -------------------------------------+------------------------------------- Reporter: heisenbug | Owner: heisenbug Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 Resolution: | Keywords: performance Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #13861 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj):
Name.hs:111 is a strict record field BTW. Does this ring a bell? Why is it OtherCon _ <- idUnfolding id but not tagged? Is it possibly implicitly unpacked?
Can you explain more? I can't make sense of this paragraph. What is "it" that might be implicitly unpacked? What does it mean to be "implicitly unpacked" ? One good thing would be to distill a tiny example, and it sounds as if you have enough insight to do that now. E.g. perhaps you are saying that {{{ data T = MkT ![Int] f (MkT xs) = xs }}} returns a badly-tagged pointer? If so, just compile that tiny program and see. etc. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14626#comment:14 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler