#11508: QuickCheck application hangs with concurrent read/write of Chan -------------------------------------+------------------------------------- Reporter: orion | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Keywords: | Operating System: FreeBSD Architecture: x86_64 | Type of failure: None/Unknown (amd64) | Test Case: | Blocked By: https://github.com/centromere | /ghc-bug-testcase | Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- If you configure the test case like so: {{{ $ cabal configure --enable-tests -fbad }}} The QuickCheck application will hang when executed: {{{ $ ./dist/build/properties/properties --quickcheck-verbose --quickcheck- tests 10 10 9 8 7 6 5 4 3 2 1 10 testCase 1 a: }}} If you compile it without the 'bad' flag, it will execute successfully. The problem is reproducible on both FreeBSD 10 and Ubuntu 15.10. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11508 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler