bug in "cut"

[Katz, Greg [IT]]

Please advise if there is some other procedure I am supposed to follow for
reporting this, or if you need other information.
The following was run under Linux for S/390 2.2.16  ,  SuSE


 wc -l /tmp/vmtcpexit 
    156 /tmp/vmtcpexit   

 wc -l /tmp/vmtcpexit | cut --fields=1
    156 /tmp/vmtcpexit   

 wc -l /tmp/vmtcpexit | cut -f 1
    156 /tmp/vmtcpexit   


in other words, "cut" does not appear to be cutting anything.