#13148: Adding weak pointers to non-mutable unboxed values segfaults -------------------------------------+------------------------------------- Reporter: mboes | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by rwbarton): A `Ptr` is a wrapper around `Addr#` in the same way that `Int` is a wrapper around `Int#`. The `Ptr` itself has no meaningful lifetime or identity (unlike the underlying memory pointed to by the pointer). So yes, attaching a finalizer to a `Ptr` will not be useful. Using `Ptr` is entirely equivalent to programming in C with manual memory management; the Haskell GC can't help you here. `Ptr` really might just as well be `Int` as far as Haskell is concerned. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13148#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler