#15427: Calling hs_try_putmvar from an unsafe foreign call can cause the RTS to hang -------------------------------------+------------------------------------- Reporter: syntheorem | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonmar): `hs_try_putmvar` is designed to be called without a Capability, I hadn't anticipated that someone might want to call it from an unsafe FFI call. What's your use case? We could definitely make this clearer in the docs, and perhaps make it fail in a better way. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15427#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler