Numbers in the begining of variable names generates problem

[Daniel Hagberg]

Message-Id: <E1VUesQ-0005he-A8@StefanO-desktop>
Date: Fri, 11 Oct 2013 17:43:42 +0200

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: 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../bash -I../bash/include 
-I../bash/lib  -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector 
--param=ssp-buffer-size=4 -Wformat -Wformat-security 
-Werror=format-security -Wall
uname output: Linux StefanO-desktop 3.2.0-54-generic #82-Ubuntu SMP Tue 
Sep 10 20:08:42 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 4.2
Patch Level: 25
Release Status: release

Description:
        the command:
                export 2_ave=$(cat 
"$type"_"$simulation"_"$from_year"_"$to_year"_"$variable"_areaaverage.txt|grep 
-v Col|head -n 1|sed 's/ //g')
        generates:
                not a valid identifier
        but:
                export _ave=$(cat 
"$type"_"$simulation"_"$from_year"_"$to_year"_"$variable"_areaaverage.txt|grep 
-v Col|head -n 1|sed 's/ //g')
        works fine ...

Repeat-By:
        A number in the beginning of the name generates this problem

Fix:

--
********************************
Daniel Hagberg

Physical Geography and Ecosystem Analysis
Land-Atmosphere Group
Lund University
Sölvegatan 12, 22362 Lund, Sweden.

Email     Daniel.Hagberg@nateko.lu.se

Phone     +46 46 2223659
Cellphone +46 735925452
********************************