#8382: ghc unhappy with program who want to program in C in haskell... -------------------------------------+------------------------------------ Reporter: wagle | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Changes (by rwbarton): * status: new => closed * resolution: => fixed Comment: Thanks for the report. Your bug is already fixed in HEAD: {{{ rwbarton@adjunction:/tmp$ ~/dist/ghc/inplace/bin/ghc-stage2 test1 -fforce- recomp [1 of 1] Compiling Main ( test1.hs, test1.o ) test1.hs:14:25: Couldn't match type ‛IV.Vector’ with ‛GV.Mutable v0 RealWorld’ The type variable ‛v0’ is ambiguous Expected type: GV.Mutable v0 (Control.Monad.Primitive.PrimState IO) (MV.MVector RealWorld a0) Actual type: IV.Vector (MV.MVector RealWorld a0) In the first argument of ‛GV.unsafeFreeze’, namely ‛v’ In a stmt of a 'do' block: iv <- GV.unsafeFreeze v }}} (In lines 20 & 14, you try to `unsafeFreeze` the result of `unsafeFreeze`. Line 14 should involve some kind of `traverse unsafeFreeze`.) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8382#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler