read builtin does not return success code (0) in spite of it successfully read line

[Коренберг Марк]

  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='/usr/share/locale' -DPACKAGE='bash' 
-DSHELL -DHAVE_CONFIG_H   -I.  -I../bash -I../bash/include 
-I../bash/lib   -g -O2 -Wall
uname output: Linux mmarkk-work 2.6.35-24-generic-pae #42-Ubuntu SMP Thu 
Dec 2 03:21:31 UTC 2010 i686 GNU/Linux
Machine Type: i686-pc-linux-gnu

Bash Version: 4.1
Patch Level: 5
Release Status: release

GOOD CASE:
mmarkk@mmarkk-work:/tmp$ echo aaa > /tmp/test1
mmarkk@mmarkk-work:/tmp$ read x < /tmp/test1 && echo success
success
mmarkk@mmarkk-work:/tmp$ echo $x
aaa
mmarkk@mmarkk-work:/tmp$

BUGGY CASE:
mmarkk@mmarkk-work:/tmp$ echo -n bbb > /tmp/test2
mmarkk@mmarkk-work:/tmp$ read y < /tmp/test2 && echo success
mmarkk@mmarkk-work:/tmp$ echo $y
bbb
mmarkk@mmarkk-work:/tmp$

So, if EOF detected but something is read successfully, please do not 
report error !


The "dialog" command when writes to --output-fd does not append newline.
so
read result < resultfile || return 1
will fail, but should not (by correct logick).