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printf -v variable ignores nullglob

From: Elmar Stellnberger
Subject: printf -v variable ignores nullglob
Date: Tue, 15 May 2007 12:49:35 +0200
User-agent: Thunderbird (X11/20070418)

Configuration Information [Automatically generated, do not change]:
Machine: i586
OS: linux
Compiler: gcc -I/usr/src/packages/BUILD/bash-3.1
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i586'
-DCONF_OSTYPE='linux' -DCONF_MACHTYPE='i586-suse-linux'
-DCONF_VENDOR='suse' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash'
-DSHELL -DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib   -O2 -march=i586
-mtune=i686 -fmessage-length=0 -Wall -D_FORTIFY_SOURCE=2 -g
-D_GNU_SOURCE -DRECYCLES_PIDS -Wall -pipe -g -fbranch-probabilities
uname output: Linux sonic #1 Tue Sep 19 07:26:15
UTC 2006 i686 i686 i386 GNU/Linux
Machine Type: i586-suse-linux

Bash Version: 3.1
Patch Level: 17
Release Status: release

Repeat By:
1. shopt -s nullglob extglob
2. echo "x$(printf "%b" @(hugo))x"
3. printf -v var "%b" @(hugo); echo "x${var}x"
# note: no file named hugo is allowed to reside in the current working

Expected Behaviour:
2. xx
3. xx

Actual Behaviour:
2. xx
3. x/current/working/directory/*.@(m3|i3|ig|mg)x

  Statetements (2) and (3) are expected to have the same effect in any
  Yet this is apparently not the case if nullglob is enabled.
  If the -v option is used to store the result in a variable, printf
seems to ignore the nullglob setting.

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