Panic when using StaticPointers with typed holes
Adding a type hole when there is a type variable in StaticPtr
throws a GHC panic:
{-# LANGUAGE StaticPointers #-}
module Foo where
import Data.Typeable
import GHC.StaticPtr
foo :: Typeable a => StaticPtr a
foo = static _
[1 of 1] Compiling Foo ( test.hs, test.o )
test.hs:9:14: error:ghc: panic! (the 'impossible' happened)
(GHC version 8.4.1 for x86_64-unknown-linux):
No skolem info:
[a_aD2[sk:2]]
Call stack:
CallStack (from HasCallStack):
callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable
pprPanic, called at compiler/typecheck/TcErrors.hs:2945:5 in ghc:TcErrors
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
This panics on both GHC 8.2.2 and 8.4.1.
Trac metadata
Trac field | Value |
---|---|
Version | 8.4.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
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Blocking | |
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