The error means that GHC's garbage collector has come across something it doesn't understand. It's either a bug in the GHC garbage collector, or in GHCi itself (which plays fast and loose with types in one or two places) or in something to do with the SDL graphics interface. Bugs like this are really hard to find, unless we can reproduce them here. Can you send us all the code? Simon | -----Original Message----- | From: John Knottenbelt [mailto:jak97@doc.ic.ac.uk] | Sent: 27 May 2001 19:24 | To: glasgow-haskell-users@haskell.org | Subject: Evacuated Object | | | I'm experimenting with GHC (5.00.1) on RedHat Linux 7.1, it's foreign | function interface (using .hsc files) and the SDL graphics | library (v1.2). | The curious thing is that the following code: | | main = sdlInit [sdlVideo[ | sdlQuit | | can be loaded into GHCi and executed as many times as I like, | however, if I then carry on and edit the module containing | main, and then perform a | reload (:r), I sometimes get an "EVACUATED object entered!" | message and GHC | crashes on me: | | TestGraphics> :r | Compiling TestGraphics ( TestGraphics.hs, interpreted ) | Ok, modules loaded: TestGraphics, SDL, Rectangle, SDLEvents, | SDLKeySyms, | ForeignUtil. | TestGraphics> main | EVACUATED object entered! | make: *** [interactive] Error 1 | bash$ | | What does this error mean, and why is it only triggered when | I perform a | reload in GHCi? | | Sometimes the reload works fine, and other times I get a | segmentation fault. | | Thanks | | John | | _______________________________________________ | Glasgow-haskell-users mailing list | Glasgow-haskell-users@haskell.org | http://www.haskell.org/mailman/listinfo/glasgow-| haskell-users |