SunOS5.8: getEffectiveUserNamem, crash illegal instruction

hello.  
  
on SunOS 5.8, with a fresh compiled ghc (configure  
 -prefix=/home/xxx/local && make)  
 and the some for the precompiled version. 
  
the simple programm crash (see test.hs).  
gdb says > gdb ./test 
This GDB was configured as "sparc-sun-solaris2.8"... 
(gdb) run 
Starting program: /home/xxx/test 
Program received signal SIGILL, Illegal instruction. 
0x1f16dc in getgrnam_r () 
(gdb) 
 
-- test.hs 
import Posix 
 
main :: IO () 
main = do 
	user <- Posix.getEffectiveUserName 
	print user 
---- 
thx in advance 
klaus 

Trac metadata

Trac field	Value
Version	6.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	ResolvedFixed
Component	libraries/unix
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