Panic in occurence analysis phase (?), getRuntimeRep
Compiling this:
{-# LANGUAGE DataKinds, GADTs, KindSignatures #-}
module Holo ()
where
data ADT (p :: Integer) where
ADT ::
{ a :: a
, b :: Integer
} -> ADT p
foo = undefined {b=undefined}- .yields:
ghc: panic! (the 'impossible' happened)
(GHC version 8.4.3 for x86_64-unknown-linux):
getRuntimeRep
p_a29z :: Integer
Call stack:
CallStack (from HasCallStack):
callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable
pprPanic, called at compiler/types/Type.hs:1967:18 in ghc:Type
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug-v4 suggests this happend during the occurence analysis phase (log attached).
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.4.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | high |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | goldfire, simonpj |
| Operating system | Linux |
| Architecture |