'source <(foo)' fails

[Felix Lee]

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' -DSHELL -DHAVE_CONFIG_H  -I.  -I. -I./include -I./lib  
-march=pentium3 -O3 -g -pipe -fomit-frame-pointer
uname output: Linux grayscale.local 2.4.20-gentoo-r5 #1 Thu Jul 3 19:31:39 PDT 
2003 i686 Pentium III (Coppermine) GenuineIntel GNU/Linux
Machine Type: i686-pc-linux-gnu

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

Description:
        $ x=foo
        $ source <(echo x=bar)
        $ echo $x
        foo

        It works in zsh.