bash invokes ".bash_logout" on "exit" command in command substitution

[jeffsh]

Configuration Information [Automatically generated, do not change]:
Machine: i386
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i386' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i386-pc-linux-gnu' 
-DCONF_VENDOR='pc' -DSHELL -DHAVE_CONFIG_H  -D_FILE_OFFSET_BITS=64  -I. 
-I/usr/include -I/home/swt/doko/export/packages/bash/bash-2.05 
-I/home/swt/doko/export/packages/bash/bash-2.05/include 
-I/home/swt/doko/export/packages/bash/bash-2.05/lib -I/usr/include -g -O2
uname output: Linux eden-hda7.my.local 2.2.19 #5 Mon Jun 25 16:26:03 EDT 2001 
i586 unknown
Machine Type: i386-pc-linux-gnu

Bash Version: 2.05
Patch Level: 0
Release Status: release

Description:
        Here is what the bash man page says about ".bash_logout",

             When a login shell exits, bash reads and executes commands
             from the file ~/.bash_logout, if it exists.

        If the "exit" command is executed by bash inside of a
        command substitution (which is not by definition a login
        shell), then the ".bash_logout" is invoked.

        Note that I can reproduce this problem only when I am
        logged in as "root(uid=0)"; however, when I am logged in
        as "jeff(uid=1001)" I cannot reproduce this problem.

Repeat-By:
        In the following typescript, the problem manifests at
        !100, but not at !196.

        195 jeff ~ $ sul
                 --> su -
        Password:
        0=-su, 1=/etc/profile, EUID=0, PWD=~root, SHELL=/bin/sh, SHLVL=1
        0=-su, 1=.bash_profile, EUID=0, PWD=~root, SHELL=/bin/sh, SHLVL=1
        0=-su, 1=.profile, EUID=0, PWD=~root, SHELL=/bin/sh, SHLVL=1
        0=-su, 1=.sh_env, EUID=0, PWD=~root, SHELL=/bin/sh, SHLVL=1

        100 root ~ # aa=`exit` ; echo $aa
        0=-su, 1=.bash_logout, EUID=0, PWD=~root, SHELL=/bin/sh, SHLVL=1

        101 root ~ # exit
        logout
        0=-su, 1=.bash_logout, EUID=0, PWD=~root, SHELL=/bin/sh, SHLVL=1

        196 jeff ~ $ aa=`exit` ; echo $aa

        197 jeff ~ $

Fix:
        [Description of how to fix the problem.  If you don't know a
        fix for the problem, don't include this section.]

Thanks,
-- 
Jeff Sheinberg  <jeffsh@erols.com>