Re: Comma expression in arithmetic evaluation referring to arrays make bash crash.

[Pontus Stenström]

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 <wooledg@eeg.ccf.org>
To:      
 Chet Ramey <chet.ramey@case.edu>
Cc:      
 Pontus Stenström <pontus.stenstrom@mycronic.com>,
bug-bash@gnu.org
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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