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Re: Some globstar patterns produce duplicate entries and a null filename


From: Ulf Magnusson
Subject: Re: Some globstar patterns produce duplicate entries and a null filename
Date: Sun, 2 Dec 2012 17:42:33 +0100

On Sun, Dec 2, 2012 at 5:40 PM, Ulf Magnusson <address@hidden> wrote:
> On Sun, Dec 2, 2012 at 4:58 PM, Roman Rakus <address@hidden> wrote:
>> On 12/01/2012 04:41 PM, Ulf Magnusson wrote:
>>>
>>> GNU bash, version 4.2.24(1)-release (i686-pc-linux-gnu)
>>>
>>> Take the following example, assumed to be run in an empty directory:
>>>
>>> $ mkdir a
>>> $ echo **
>>> a
>>> $ echo **/**
>>>   a a
>>> $ echo **/**/**
>>>   a a a
>>>
>>> I would expect the result to be just 'a' in all cases.
>>>
>>> You also get back a null filename, as shown by
>>>
>>> $ for f in **/**/**; do echo "'$f'"; done
>>> ''
>>> 'a'
>>> 'a'
>>> 'a'
>>>
>>> /Ulf
>>>
>> I can't reproduce it on my Fedora with bash 4.2.10 nor 4.2.39. Tried turn on
>> and off extglob shell option.
>> Can you please resend your report with `bashbug' script? Or at least say
>> which linux distribution you are using?
>>
>> RR
>>
>
> Ubuntu 12.04. My configuration is
> https://github.com/ulfalizer/Configuration-files/blob/master/bash,
> which I 'source' from the standard Ubuntu ~/.bash. I noticed the bug
> while implementing the _super_glob function.
>
> bashbug information:
>
> Machine: i686
> OS: linux-gnu
> Compiler: gcc
> Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i686'
> -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-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 Huvuddator 3.2.0-32-generic-pae #51-Ubuntu SMP Wed
> Sep 26 21:54:23 UTC 2012 i686 i686 i386 GNU/Linux
> Machine Type: i686-pc-linux-gnu
>
> /Ulf

Left out some bashbug information:

Bash Version: 4.2
Patch Level: 24
Release Status: release

/Ulf



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