ghc: panic! (the 'impossible' happened)
GHC asked me nicely to report this compile-time panic / crash.
Minimal code:
{-# LANGUAGE Rank2Types #-}
module Foo where
import System.Random.MWC (GenST)
run :: (forall s . GenST s) -> Int
run = 0
Output:
$ ghc Foo.hs
[1 of 1] Compiling Foo ( Foo.hs, Foo.o )
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for x86_64-unknown-linux):
tcTyVarDetails
( s{tv a10F} [tv] :: ghc-prim:GHC.Prim.*{(w) tc 34d} )
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Trac metadata
Trac field | Value |
---|---|
Version | 7.4.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |