warning for possible missing & in foreign import
I am attaching files to hopefully reproduce a problem I am having. I have not upgraded to 6.6.1 yet so let me know if it has been fixed.
$ touch fpenv_c.c fpenv.hs && cc -g -Wall -c fpenv_c.c && ghc -fasm --make fpenv.hs fpenv_c.o -lc [1 of 1] Compiling Main ( fpenv.hs, fpenv.o ) Linking fpenv ... $ ./fpenv (x,xFP)=(0x08090628,0x08090628) fin_test: env=0xa7900040, p=0x808e00c zsh: segmentation fault ./fpenv $ ghc --version The Glorious Glasgow Haskell Compilation System, version 6.6.20070420
Running in valgrind shows:
... fin_test: env=0x437c008, p=0x1 ==12777== ==12777== Jump to the invalid address stated on the next line ==12777== at 0x1F: ??? ==12777== Address 0x1F is not stack'd, malloc'd or (recently) free'd
I think this is when fin_test exits. I am experiencing this problem in a much larger program, so I wrote this test case to figure out what is going wrong. Am I using the newForeignPtrEnv API incorrectly?