Unexpected output

[Erik Braun]

Configuration Information [Automatically generated, do not change]:
Machine: alphaev6
OS: osf5.1
Compiler: cc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='alphaev6' 
-DCONF_OSTYPE='osf5.1' -DCONF_MACHTYPE='alphaev6-dec-osf5.1' 
-DCONF_VENDOR='dec' -DSHELL  -DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib 
-I/usr/local/include -g
uname output: OSF1 pax10e3.mipool.uni-jena.de V5.1 732 alpha
Machine Type: alphaev6-dec-osf5.1

Bash Version: 2.04
Patch Level: 0
Release Status: release

Description:
        The command
        $ finger -m $USER|grep $(tty | sed "s/^\/dev\///")
        which outputs something like "on pts/8 from paxp22.mipool.uni-jena.de"
        (using Bash 2.01) now prints strange errors:
        
        grep: can't open a
        grep: can't open tty
        
        Strange enough, the distinct parts of the commands do what they
        should do:
        
        $ echo $(tty | sed "s/^\/dev\///")
        pts/8
        $ finger -m $USER|grep pts/8
           on pts/8 from paxp22.mipool.uni-jena.de
        

Repeat-By:
        finger -m $USER|grep $(tty | sed "s/^\/dev\///")