bug#50025: closed (Strange? grep behaviour)

[GNU bug Tracking System]

Your message dated Fri, 13 Aug 2021 12:26:40 -0700
with message-id <5457a2ad-a311-57d4-5f46-ea67706193fd@cs.ucla.edu>
and subject line Re: Strange? grep behaviour
has caused the debbugs.gnu.org bug report #50025,
regarding Strange? grep behaviour
to be marked as done.

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50025: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=50025
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--- Begin Message --- Subject: Strange? grep behaviour Date: Thu, 12 Aug 2021 10:27:43 +0200 User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0

Hello fellow Grepers!

the following line:

echo -n "9999:egov" | sha256sum | grep -E "[0-9a-f]+" -o | xxd -r -p | base32 | grep -E "[0-9A-Z]+" -o

produces the following output

LCBSPBBX6BY6
VZX6P6TZMMRETTCSPXZU7GJTAPPZCPKF2UJEYDA

expected output:

LCBSPBBX6BY6WVZX6P6TZMMRETTCSPXZU7GJTAPPZCPKF2UJEYDA

As you can see it removes a single 'W' and replaces it with a new line.

Running Gnu grep 3.6, zsh and Gnome Terminal

uname: Linux 5.13.9-arch1-1 #1 SMP PREEMPT Sun, 08 Aug 2021 11:25:35 +0000 x86_64 GNU/Linux

Tried bash as well with same result.

On macOs i get the expected result, a colleague running the same base os on similar hwconfig computer but other device but with XFCE terminal also gets expected result so this seems to be something particular to my system but I have not been able to find why.

Everything looks the same up till the last grep. If I change the regexp to \w+ I get the expected output.

Honestly, dont know if this is a bug or just something iffy on my device but thought it might be better to contact you anyways to see if you can reproduce this in any way

--
____________________________________
Daniel Forsberg
Developer at eGovlab

Department of Computer and Systems Sciences
Stockholm University
Postbox 7003, SE-164 07 Kista
Visiting address: Borgarfjordsgatan 12, Kista
https://egovlab.eu/
https://dsv.su.se
____________________________________

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--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: Strange? grep behaviour
>
>
>
>
> Date: 
>
> Fri, 13 Aug 2021 12:26:40 -0700
>
>
>
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> User-agent: 
>
> Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0
>
>
>
>
> On 8/13/21 12:36 AM, Daniel Forsberg wrote:
> > That fixed it. Will continue digging a bit on this. Will keep you posted
> > if I find out what it is that causes this
>
> Thanks. Closing the bug report in the meantime.
>
>
> --- End Message ---