GNU bug report logs - #46802
grep (GNU grep) 3.6 RexEx range reversed.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#46802: closed (grep (GNU grep) 3.6 RexEx range reversed.)
Date: Fri, 26 Feb 2021 20:21:02 +0000

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Your message dated Fri, 26 Feb 2021 12:20:41 -0800
with message-id <cf33235b-9b3b-1971-996d-da9d87521958 <at> cs.ucla.edu>
and subject line Re: bug#46802: grep (GNU grep) 3.6 RexEx range reversed.
has caused the debbugs.gnu.org bug report #46802,
regarding grep (GNU grep) 3.6 RexEx range reversed.
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: "Georgi K." <strammer <at> abv.bg>
To: bug-grep <at> gnu.org
Subject: grep (GNU grep) 3.6 RexEx range reversed.
Date: Fri, 26 Feb 2021 19:29:44 +0200 (EET)

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 Dear Grep team,  
  
  My installation of grep thinks [a-Z] is a valid range, while [A-z] is not.  
  OS:  ArcoLinux  
  Kernel Version:
5.11.1-zen1-1-zen  
  Grep Version:
  grep (GNU grep) 3.6  
  Shell Version:
GNU bash, version 5.1.4(1)-release (x86_64-pc-linux-gnu)
  
  Locale:
en_US.utf8  
  Steps to reproduce:  
  $ echo "test" | grep -E "[a-Z]"
test
  
 $ echo "test" | grep -E "[A-z]"
 grep: Invalid range end  
  Please, let me know if I can produce some debug log for you.  
  
  Best,  
  George
 

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: "Georgi K." <strammer <at> abv.bg>
Cc: 46802-done <at> debbugs.gnu.org
Subject: Re: bug#46802: grep (GNU grep) 3.6 RexEx range reversed.
Date: Fri, 26 Feb 2021 12:20:41 -0800

On 2/26/21 9:29 AM, Georgi K. wrote:
>    My installation of grep thinks [a-Z] is a valid range, while [A-z] is not.

That's because 'a' collates before 'Z' in your locale, but 'A' does not 
collate before 'z'. If that's not what you want you can change your 
locale, e.g., by setting LC_ALL="C" in your environment.

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