#7787: modifyMVar does not restore value if callback returns error value ------------------------------------------------+-------------------------- Reporter: joeyadams | Owner: Type: bug | simonmar Priority: high | Status: new Component: libraries/base | Milestone: 7.8.1 Resolution: | Version: 7.7 Operating System: Unknown/Multiple | Keywords: Type of failure: Incorrect result at runtime | Architecture: Test Case: | Unknown/Multiple Blocking: | Difficulty: | Unknown | Blocked By: | Related Tickets: ------------------------------------------------+-------------------------- Comment (by simonmar): Fixed: commit fd39d598e570145ac144b9cb6512c7faa3092ae1 {{{ Author: Simon Marlow <marlowsd@gmail.com> Date: Fri Jul 19 09:09:39 2013 +0100 Fix #7787 Now the pair is evaluated strictly inside the exception handler. I figured this would be less likely to introduce space leaky bugs than using an irrefutable pattern match. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7787#comment:6> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler