#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: -------------------------------------+------------------------------------ Comment (by simonmar): @exbb2: we already have `SomeAsyncException`, and the asynchronous exceptions are children of this in the exception hierarchy. The exception hierarchy needs a single root, so `SomeException` remains.

Every innocuous catch or try anywhere at any time in any library can make a thread unintentionally uncancelable

I'm not sure what you mean here. The issue in this ticket only arises when using `unsafePerformIO`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/5902#comment:19 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler