# [PATCH] t3419-*.sh: Fix arithmetic expansion syntax error

3 messages from 2010-12-21 to 2010-12-22. Participants: Ramsay Jones, Junio C Hamano, Clemens Buchacher.
Thread: https://gitlist.dev/t/26116

## Ramsay Jones, 2010-12-21 18:50

Subject: [PATCH] t3419-*.sh: Fix arithmetic expansion syntax error
Message-ID: <4D10F707.1000206@ramsay1.demon.co.uk>
URL: https://gitlist.dev/e/4D10F707.1000206%40ramsay1.demon.co.uk

```

Some shells, for example dash versions older than 0.5.4, need to
spell a variable reference as '$N' rather than 'N' in an arithmetic
expansion. In order to avoid the syntax error, we change the
offending variable reference from 'i' to '$i' in function scramble.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
---

Note that this test is unique in having an '#!/bin/bash' line (rather
than '#!/bin/sh'), which was (indirectly) responsible for me not
noticing this failure for a while. I don't see anything that would
require bash, so I suspect this is not intensional.

ATB,
Ramsay Jones

 t/t3419-rebase-patch-id.sh |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/t/t3419-rebase-patch-id.sh b/t/t3419-rebase-patch-id.sh
index 1aee483..6972b49 100755
--- a/t/t3419-rebase-patch-id.sh
+++ b/t/t3419-rebase-patch-id.sh
@@ -27,7 +27,7 @@ scramble()
 		then
 			echo "$x"
 		fi
-		i=$(((i+1) % 10))
+		i=$((($i+1) % 10))
 	done < "$1" > "$1.new"
 	mv -f "$1.new" "$1"
 }
-- 
1.7.3

```

## Junio C Hamano, 2010-12-21 20:24

Subject: Re: [PATCH] t3419-*.sh: Fix arithmetic expansion syntax error
Message-ID: <7vei9a98mw.fsf@alter.siamese.dyndns.org>
URL: https://gitlist.dev/e/7vei9a98mw.fsf%40alter.siamese.dyndns.org
In-Reply-To: <4D10F707.1000206@ramsay1.demon.co.uk>

```
Ramsay Jones <ramsay@ramsay1.demon.co.uk> writes:

> Note that this test is unique in having an '#!/bin/bash' line (rather
> than '#!/bin/sh'),...

Thanks for spotting, and that is idiotic for us to have such a script.
We should fix the shebang line as well.

A quick git-grep shows that this is the only instance of this problem
(outside contrib/completion/git-completion.bash, that is).

```

## Clemens Buchacher, 2010-12-22 18:42

Subject: Re: [PATCH] t3419-*.sh: Fix arithmetic expansion syntax error
Message-ID: <20101222184242.GA6088@localhost>
URL: https://gitlist.dev/e/20101222184242.GA6088%40localhost
In-Reply-To: <4D10F707.1000206@ramsay1.demon.co.uk>

```
On Tue, Dec 21, 2010 at 06:50:47PM +0000, Ramsay Jones wrote:
> 
> Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>

Thanks.

> Note that this test is unique in having an '#!/bin/bash' line (rather
> than '#!/bin/sh'), which was (indirectly) responsible for me not
> noticing this failure for a while. I don't see anything that would
> require bash, so I suspect this is not intensional.

Indeed. I actually removed all bashisms from the script, but then
apparently forgot to get rid of #!/bin/bash as well.

Clemens

```