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'unset' not fully unsets function's local numeric variables


From: Emilio A. Lazo Z.
Subject: 'unset' not fully unsets function's local numeric variables
Date: Sun, 7 Apr 2002 22:11:27 -0400 (VET)

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-redhat-linux-gnu'
-DCONF_VENDOR='redhat' -DSHELL -DHAVE_CONFIG_H  -D_GNU_SOURCE
-D_FILE_OFFSET_BITS=64  -I.  -I. -I./include -I./lib -I/usr/include -O2
-march=i386 -mcpu=i686
uname output: Linux magin.local.net 2.4.18-ac3 #41 Fri Apr 5 16:10:19 VET
2002 i686 unknown
Machine Type: i386-redhat-linux-gnu

Bash Version: 2.04
Patch Level: 21
Release Status: release

Description:
   The builtin command 'unset' seems to not 'fully' unsets a NUMERIC
variable when it is local to a function.
   More explicitly, if we declare a local variable and later we assign a
numeric value to it, after applying unset, it seems to be sucesfully
unsetted but if we perform a math operation over it (such as i=$[i+1]),
the variable is trated with its last value and the operation returns, in our
case: '2' instead of '1'

Repeat-By:
    a shell script is attached

I think this is a bug and not a particular wrong behavior on my
system...right?

Bye, regards...


-- 
<--->

Universidad Central de Venezuela
Facultad de Ciencias

Emilio A. Lazo Z.

E-mails: address@hidden
         address@hidden
         address@hidden

Attachment: bashbug.sh
Description: Bourne shell script


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