Description of problem:
busybox egrep function tries to free invalid pointer

Version-Release number of selected component (if applicable):
busybox-1.00.rc1-5

How reproducible:
Always

Steps to Reproduce:
cat - > /tmp/regexp.partitions <<EOF
[hs]d[a-z]( |$)
cciss/c[0-9]d[0-9]( |$)
EOF

DISK="`busybox egrep -f /tmp/regexp.partitions /proc/partitions | \
           awk 'NR==1 {print $4}'`"

echo ${DISK}
  
Actual results:
*** glibc detected *** free(): invalid pointer: 0xbffc7b6b ***

Expected results:
hdc

Additional info:
This problem does not exist on FC4 systems with busybox-1.00-5.fc4.  Also, this
bug affects the network install "boot.iso" included with RHEL-4.U3-i386.