#11508: QuickCheck application hangs with concurrent read/write of Chan -------------------------------------+------------------------------------- Reporter: orion | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: x86_64 | (amd64) Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): I had a quick look at the testcase. Judging from the eventlog it appears that there are a few threads blocking: * one thread blocking on a `MVar` * another blocking on an STM retry Finally, we also have foreign calls involved due to the `ByteString` usage. Sadly `-fno-omit-yields` doesn't seem to help. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11508#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler