The head is invalid

[Manuel M T Chakravarty]

The head finally builds again, but it does not validate on x86/MacOS:

OVERALL SUMMARY for test run started at Fri Aug 10 11:32:25 EST 2007
     1835 total tests, which gave rise to
     7171 test cases, of which
        0 caused framework failures
     5628 were skipped

     1482 expected passes
       59 expected failures
        0 unexpected passes
        2 unexpected failures

Unexpected failures:
    derefnull(normal)
    ghci019(ghci)

I attach more details about defrefnull below.  Roman just said he 
fixes ghci019.

Manuel

-=-

=====> derefnull(normal)
cd . && '/Users/chak/Code/ghc-test/compiler/stage1/ghc-inplace' 
-no-recomp -dcore-lint -dcmm-lint -Di386_apple_darwin  -o derefnull 
derefnull.hs    >derefnull.comp.stderr 2>&1
cd . && ./derefnull    </dev/null >derefnull.run.stdout 
2>derefnull.run.stderr
Wrong exit code (expected 139 , actual 138 )
Stdout:

Stderr:

*** unexpected failure for derefnull(normal)