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Re: Comma expression in arithmetic evaluation referring to arrays make b


From: Pontus Stenström
Subject: Re: Comma expression in arithmetic evaluation referring to arrays make bash crash.
Date: Mon, 15 Feb 2016 16:03:12 +0100

Thanks,
it also works fine in GNU bash, version 4.3.42(4)-release (i686-pc-cygwin)
Sorry for troubbling you, I will upgrade my bash.
Regards -- Pontus



From:        Greg Wooledge <address@hidden>
To:        Chet Ramey <address@hidden>
Cc:        Pontus Stenström <address@hidden>, address@hidden
Date:        2016-02-15 15:47
Subject:        Re: Comma _expression_ in arithmetic evaluation referring to arrays make bash crash.




On Mon, Feb 15, 2016 at 09:31:57AM -0500, Chet Ramey wrote:
> On 2/15/16 8:57 AM, Pontus Stenström wrote:
>
> > Bash Version: 4.2
> > Patch Level: 24
> > Release Status: release
> >
> > Description:
> >     Comma _expression_ in arithmetic evaluation referring to arrays make bash
> > crash.
> >
> > Repeat-By:
> >     This works fine:
> >     ((c=3, d=4))
> >     This crashes my bash:
> >     a=(2 3 4 5)        # OK
> >     ((c=a[3], d=a[2])) # Crash
>
> It runs fine on bash-4.3.42 on RHEL 5 and Mac OS X.

On HP-UX, it doesn't crash, but doesn't work quite right either:

imadev:~$ bash-4.2 -c 'echo "$BASH_VERSION"; a=(2 3 4 5); ((c=a[3], d=a[2])); declare -p a c d'
4.2.46(1)-release
declare -a a='([0]="2" [1]="3" [2]="4" [3]="5")'
declare -- c="5"
bash-4.2: line 0: declare: d: not found

4.2 is the second-newest release, but 4.2.24 is 29 patches behind.
The current patch level for 4.2 is 4.2.53.  I'm apparently a bit behind
the current patch level as well.

It works in 4.3, as Chet said.




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