Segfault due to levity polymorphism of mkWeak#
This code segfaults:
{-# LANGUAGE MagicHash, UnboxedTuples #-}
import GHC.Prim
import GHC.Types
main = do
let local = ()
let null = 0## :: Word#
let triple = (# local, null, null #)
IO (\s -> case mkWeakNoFinalizer# triple () s of (# s, r #) -> (# s, () #))
The problem is that mkWeakNoFinalizer#
has a levity polymorphic type for its first argument, but the implementation really requires the first argument to be a pointer.
Trac metadata
Trac field | Value |
---|---|
Version | 8.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | goldfire |
Operating system | |
Architecture |