[jhc] [bug][jhc 7.7] about newIOArray: variable undeclared in the generated C source

[John Meacham]

Ah, finally had time to track down and fix this. It will be fixed in
the next jhc release. thanks for the report!

    John

On Tue, Dec 6, 2011 at 11:11 AM,  <emacsray at gmail.com> wrote:
> Hi all,
>
> The generated C source hs.out_code.c cannot be compiled due to
> an undeclared variable. Here is the snippet code which can reproduce the
> issue.
>
>
> import Data.Array.IO
> main = do
>    arr <- newIOArray (0,42) 0 :: IO (IOArray Int Int)
>    print 13
>
>
> Here is the excerpt from jhc's output:
>
>
> Writing "hs.out_code.c"
> Running: gcc '-std=gnu99' -D_GNU_SOURCE '-falign-functions=4' -ffast-math -Wextra -Wall -Wno-unused-parameter -fno-strict-aliasing -o hs.out hs.out_code.c -DNDEBUG -O3 '-D_JHC_GC=_JHC_GC_JGC'
> hs.out_code.c: In function ‘ftheMain’:
> hs.out_code.c:1867:27: error: ‘v119549094’ undeclared (first use in this function)
> hs.out_code.c:1867:27: note: each undeclared identifier is reported only once for each function it appears in
> hs.out_code.c: In function ‘fx57580221’:
> hs.out_code.c:1886:24: warning: comparison between signed and unsigned integer expressions
> hs.out_code.c:1889:9: warning: statement with no effect
> hs.out_code.c:1926:17: warning: statement with no effect
> jhc: user error (C code did not compile.)
>
>
> The whole session is enclosed as `typescript'.
>
>
> Btw, jhc 7.7  cannnot be compiled on ghc 7.0.4 smoothly. I add `{-#
> LANGUAGE TypeFamilies #-}' and `import Data.Generics hiding (empty)' to
> get it compiled.
>
> --
> Regards,
> Ray
> ----------------------------
> site: http://maskray.tk
> ----------------------------
>
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