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 |