#5859: unsafeInterleaveIO duplicates computation when evaluated by multiple threads -------------------------------------+------------------------------------- Reporter: joeyadams | Owner: simonpj Type: bug | Status: closed Priority: normal | Milestone: Component: Core | Version: 7.2.2 Libraries | Keywords: Resolution: fixed | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: Incorrect | Related Tickets: result at runtime | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thomie): * cc: core-libraries-committee@… (added) * status: new => closed * resolution: => fixed * milestone: 7.10.1 => Comment: Replying to [comment:6 simonpj]:

Cf #5943. Since `unsafeDupableInterleaveIO` is now NONINLINE, the symptoms of this ticket might have gone away.

I confirm, as did bgamari:

Indeed I can't reproduce the buggy behavior with 7.6.2 and 7.7 HEAD.

For reference, in commit bbcf397765953798b6d730c2bd1088c3463f3f5b: {{{ Author: Simon Marlow <> Date: Fri Mar 23 12:28:18 2012 +0000 change unsafeDupableInterleaveIO from INLINE to NOINLINE (#5943) See the comment for details. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/5859#comment:14 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler