Memory leak when using ${!prefix@} in a loop

[muszi]

Configuration Information [Automatically generated, do not change]:
Machine: i486
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i486' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i486-pc-linux-gnu' 
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
-DHAVE_CONFIG_H   -I.  -I../bash -I../bash/include -I../bash/lib   -g -O2
uname output: Linux muszi.kite.hu 2.6.28.10 #2 PREEMPT Fri Jun 12 14:13:54 CEST 
2009 i686 GNU/Linux
Machine Type: i486-pc-linux-gnu

Bash Version: 3.1
Patch Level: 17
Release Status: release

Description:
        Looks like we have a memory leak when using ${!prefix@} in a loop

Repeat-By:
        It can be reproduced by running this little script:

        while true; do
          echo "${!prefix@}"
        done