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Re: Missing character when using ${VAR:1} and length(VAR)==1


From: Stephane Chazelas
Subject: Re: Missing character when using ${VAR:1} and length(VAR)==1
Date: Fri, 21 Sep 2007 07:28:11 +0100
User-agent: Mutt/1.5.16 (2007-06-11)

On Fri, Sep 21, 2007 at 05:16:03AM +0200, Jan Schampera wrote:
> Chet Ramey wrote:
>
>>> Description:
>>>         there is missing a charachter when using the following:
>>>         # TT="oo"; echo "l${TT:1}l"
>>>         lol
>>>         # TT="o"; echo "l${TT:1}l"
>>>         l
>> I can't reproduce this; I get `ll' from the second expansion.
>
> I can't reproduce it on a 2.05b:
>   $ TT="o"; echo "l${TT:1}l"
>   ll
>
> But I can reproduce it (or at least something weird) on a 
> 3.1.17(1)-release:
>   $ TT="o"; echo "l${TT:1}l"
>   lXl
> (where X is a non-printable character for my terminal here, maybe 
> multibyte)
[...]

Same here. The character is DEL:

~$ bash -c 'TT="o"; echo "l${TT:1}l"' | od -c
0000000   l 177   l  \n
0000004
~$ locale charmap
ISO-8859-15
~$ bash --version
GNU bash, version 3.1.17(1)-release (i486-pc-linux-gnu)
Copyright (C) 2005 Free Software Foundation, Inc.

~/install/bash-3.2$ ./bash -c 'TT="o"; echo "l${TT:1}l"' | od -c
0000000   l   l  \n
0000003
~/install/bash-3.2$ ./bash --version
GNU bash, version 3.2.25(2)-release (i686-pc-linux-gnu)
Copyright (C) 2005 Free Software Foundation, Inc.

(why doesn't the Copyright extend to 2007, BTW?)

-- 
St├ęphane




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