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unset builtin behaves differently from bash manual

From: Mu Qiao
Subject: unset builtin behaves differently from bash manual
Date: Fri, 27 May 2011 22:15:06 +0800
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv: Gecko/20110414 Lightning/1.0b2 Thunderbird/3.1.10

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: x86_64-pc-linux-gnu-gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu'
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash'
-DSHELL -DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib
-DSSH_SOURCE_BASHRC -march=core2 -O2 -pipe -mtune=generic
uname output: Linux qiaomuf-laptop 2.6.36-gentoo-r8 #2 SMP Wed May 11
16:48:09 CST 2011 x86_64 Intel(R) Core(TM)2 Duo CPU P8700 @ 2.53GHz
GenuineIntel GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 4.1
Patch Level: 9
Release Status: release

  We haven't checked bash-4.0 but for bash-4.1 and later, without
options, unset first tries to unset a variable, and if that fails, tries
to unset a function. However, The manual still states the old behavior.


    fix the manual

Best wishes,
Mu Qiao
Gentoo Linux Developer
GnuPG fingerprint: 92B1 B0C4 8D14 F8C4 EFA5  3ACC 30B3 0DE4 17B1 57E9

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