No TypeRep for unboxed tuples
This now crashes on GHC HEAD:
{-# LANGUAGE MagicHash #-}
{-# LANGUAGE UnboxedTuples #-}
module Main where
import Data.Typeable
import GHC.Exts
main :: IO ()
main = print $ typeOf (Proxy :: Proxy (# Int, Int #))
$ /opt/ghc/head/bin/ghc -O2 -fforce-recomp Example.hs
[1 of 1] Compiling Main ( Example.hs, Example.o )
ghc: panic! (the 'impossible' happened)
(GHC version 8.1.20160317 for x86_64-unknown-linux):
tyConRep (#,#)
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
(Previously, this was rejected with an error message, since you couldn't
put an unlifted type as the argument of Proxy
.)
(Copied from ticket:11471#comment:117929.)
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 | |
Operating system | |
Architecture |