ghc/lib/cbits/system.c doesn't compile

==fptools== gmake all --no-print-directory -r; in /usr/local/pub-bkb/ghc/fptools/ghc/lib/std/cbits ../../../driver/ghc-inplace -O -I../../../includes -I../../../rts -Wall -static-c system.c -o system.o system.c:71:

problem building optimized compiler

(building cvs top with 4.06) When compiling CoreUnfold with the -O flag: ParseIface.hs:6827: Non-exhaustive patterns in case ciao. -- Brian Kernighan has an automobile which he helped design. Unlike most automobiles, it has neither speedometer, nor gas gauge, nor any of the numerous