Hi, there
I am using Greencard with Hask's foreign function export. I found
the following program can cause seg-fault. Anyone has any idea? BTW,
if I replace greencard with Hask's foreign function import, there
is no such error.
in ABC.gc:
foreign export ccall "h_add" h_add :: Int -> IO Int
h_add a = do
putStrLn "in haskell callback"
return (a + 1)
%fun add :: Int -> IO(Int)
%call (int a)
%code int r;
% r = c_add (a);
%result (int r)
and the result is like:
in c callback
in haskell callback
Segmentation Fault
in add.c:
_RESULT c_add(int a) {
printf("in c callback\n");
return h_add(a);
}
TIA!
------
chenyu
in Main.hs:
main = do
a <- add 127
putStrLn (show a)
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