#5902: Cannot tell from an exception handler whether the exception was asynchronous -------------------------------------+------------------------------------ Reporter: simonmar | Owner: simonmar Type: bug | Status: new Priority: high | Milestone: 7.8.1 Component: Compiler | Version: 7.4.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Changes (by exbb2): * priority: normal => high Comment: If a type-based solution is implemented, I propose for SomeException to be deprecated and split into SomeSyncException and SomeAsyncException. Right now, SomeException and lack of discrimination for asynchronous exceptions pose serious threat to modularity in concurrent applications. Every innocuous catch or try anywhere at any time in any library can make a thread unintentionally uncancelable. I had to write patches for three different libraries because of this recurring problem; what would happen if my project depended on 50 libraries all throwing and catching exceptions? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/5902#comment:18 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler