id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
22	IndexScalar does not produce the correct value when it is used in the default value expression of scan and fold	seanl	seanl	"{{{IndexScalar}}} does not produce the correct value when it is used in the default value expressions of scan and fold.

For example,

{{{
foo :: Vector Word32 -> Acc (Vector Word32)
foo xs
  = let
      xs' = use xs
    in
    Prelude.fst $ Acc.scanl const (xs' Acc.! constant 4) xs'

main :: IO ()
main = do
  let input = fromList 10 [0..] :: Vector (Word32)
  r <- CUDA.run $ foo input2
  putStrLn $ show r
}}}

is meant to produce 

{{{
Array 10 [4,4,4,4,4,4,4,4,4,4]
}}}

but it produces

{{{
Array 10 [0,0,0,0,0,0,0,0,0,0]
}}}"	defect	closed	major		CUDA backend	0.7.1.0	fixed