Parent shell sometimes exits after command substitution and back-grounding

[jneuheisel]

Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i686' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu' 
-DCONF_VENDOR='pc' -DLOCALEDIR='/tmp/REMOVEME/LOCAL/share/locale' 
-DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H  -I.  -I/tmp/REMOVEME/bash-3.0 
-I/tmp/REMOVEME/bash-3.0/include -I/tmp/REMOVEME/bash-3.0/lib   -g -O2
uname output: Linux hal.barc.equinoxsensors.com 2.6.11.11 #1 SMP Wed Jun 1 
09:06:51 EDT 2005 i686 i686 i386 GNU/Linux
Machine Type: i686-pc-linux-gnu

Bash Version: 3.0
Patch Level: 16
Release Status: release

Description:
        bash 3.0 sometimes incorrectly exits when executing an interactive 
background
        command that contains process substitution.  This happened with bash 3.0
        and patch 14, so I compiled bash 3.0 with all the patches up to 16, and 
it
        still happens.

Repeat-By:
        In an interactive shell, repeatedly execute the command:
        prompt>  echo $(ls * | sort -n) &
        After a random number of executions, the parent shell will exit with
        a return value of 0.

Fix:
        Unknown