Finalizer running prematurely in ghci
I have been building a library for doing hash consing, but it seemed to incorrectly finalize references to live entries in the hash cons table when I use it from ghci.
I've distilled the problem to the following test case.
Prelude System.Mem.Weak GHC.IO> let x = let y = "foo" in (unsafePerformIO $ addFinalizer y (putStrLn "deleted")) `seq` y
Prelude System.Mem.Weak GHC.IO> x
"foo"
deleted
Prelude System.Mem.Weak GHC.IO> x
"foo"
Trac metadata
Trac field | Value |
---|---|
Version | 7.0.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | GHCi |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |