#15834: genSym is not thread safe with respect to setNumCapabilities ---------------------------------+---------------------------------------- Reporter: NeilMitchell | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.6.1 Resolution: invalid | Keywords: Operating System: Linux | Architecture: Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | ---------------------------------+---------------------------------------- Changes (by NeilMitchell): * status: new => closed * resolution: => invalid Comment: Looking further, I came up with a minimal test case for generating uniques on multiple threads which produced duplicates. I was able to reproduce it on our internal build of GHC, but NOT a stock build. I am now fairly certain that the build of GHC didn't get THREADED_RTS passed to the genSym.c file, explaining the duplicate uniques. Sorry for the noise! -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15834#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler