#9390: Inlining prevents evaluation of ignored parts of unboxed tuples -------------------------------------+------------------------------------- Reporter: snoyberg | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.8.4 Component: Compiler | Version: 7.8.3 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: Incorrect | Difficulty: Unknown result at runtime | Blocked By: Test Case: | Related Tickets: Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by simonpj): I have this 95% done, but keep getting distracted. I hope to commit my fix on Thursday. It can go in 7.8.4 if we ever make such a release. Meanwhile, notice that you are in effect using an inlined version of `unsafePerformIO`: your function `inlineWriteB` conjures up a `realWorld#` and then discards it again. If you use the real `unsafePerformIO` (which is not inlined until much later if at all) I think the problem will go away. That might be a workaround. Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9390#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler