#9278: GHCi crash: selector _ for message _ does not match selector known to Objective C runtime -------------------------------------+------------------------------------- Reporter: mietek | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 7.6.3 Resolution: | Keywords: crash, dynamic Differential Revisions: | linking Architecture: x86_64 | Operating System: MacOS X (amd64) | Type of failure: GHCi crash Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #9277 | -------------------------------------+------------------------------------- Changes (by chak): * cc: chak@… (added) Comment: AFAIK, the Objective-C runtime executes some initialisation code to set up Objective-C classes. The system linker produces executables that ensure that this initialisation is performed before any application code is being run. GHC's runtime doesn't know anything about that, though, and will just load the Objective-C binary code without performing the required runtime initialisation. Based on that, I believe, the error message you are seeing is a consequence of the selectors for the classes not being registered in the data structures used by `objc_msgSend()`. Here is a description of the internals of the ObjC runtime: http://cocoasamurai.blogspot.com.au/2010/01/understanding- objective-c-runtime.html -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9278#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler