#15155: How untagged pointers sneak into banged fields -------------------------------------+------------------------------------- Reporter: heisenbug | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: 14677 Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): I'm lost in a maze of twisty passages. We have * #14677 Code generator does not correctly tag a pointer. I'm not sure if this is a serious bug, or just the loss of a potential optimisation. (I think the latter.) * #14626 No need to enter a scrutinised value. Apparently blocked on #14677 * #14373 Introduce PTR-tagging for big constructor families. This has Phab:D4267. I think it may be blocked (in some way) on #15155. * #15155 (this ticket). I'm not sure how these tickets inter-relate beyond the blocking notes I've put here. Which is most urgent? Gabor, are you actively working on any of them? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15155#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler