Subject: Re: [ksh93-integration-discuss] CR 6715496 Updated P2 shell/korn93
ksh93 SEGVs on array reinitialization
--------
> *Synopsis*: ksh93 SEGVs on array reinitialization
>
> CR 6715496 changed on Jun 17 2008 by <User 1-6Y4MMS>
>
> === Field ============ === New Value ============= === Old Value =============
>
> Work Around New Note
> ====================== =========================== ===========================
>
>
> *Change Request ID*: 6715496
>
> *Synopsis*: ksh93 SEGVs on array reinitialization
>
> Product: solaris
> Category: shell
> Subcategory: korn93
> Type: Defect
> Subtype:
> Status: 1-Dispatched
> Substatus:
> Priority: 2-High
> Introduced In Release:
> Introduced In Build:
> Responsible Engineer:
> Keywords:
>
> === *Description* ============================================================
> ksh93 dumps core when an array variable previously declared with "set -A
> vname"
> is reinitialized
> by redeclaring it using "set -A vname".
>
> By reinitializing, we mean throwing away all array data that has been
> assigned s
> o far and
> recreating the array as a freshly created 'set -A' variable would -- with no
> ini
> tial data
> until specifically assigned.
>
> Attached are a script that reproduces the bug and a core file produced when
> the
> script was run.
>
> *** (#1 of 1): 2008-06-17 13:57:39 GMT+00:00 <User 1-5Q-8946>
>
>
> === *Workaround* =============================================================
> Instead of using simply 'set -A vname' to reinitialize the array, use
> set -A vname -- ""
> This creates an array of size 1.
>
> Do note that this is NOT exactly identical to "set -A vname" which
> creates an array of ZERO size (i.e., ${vname[*]} returns 0).
>
> *** (#1 of 2): 2008-06-17 13:57:39 GMT+00:00 <User 1-5Q-8946>
>
> AFAIK it should be possible to do an $ unset arrayname # before the $ set -A
> arr
> ayname # to work around this problem, too.
>
> *** (#2 of 2): 2008-06-17 20:09:48 GMT+00:00 <User 1-6Y4MMS>
>
>
I tried to reproduce on Linux without success with the following:
============cut here==========
set -A vname -- foo bar
set -A vname
============cut here==========
Is this correct? If not, what sequence reproduces it?
David Korn
dgk at research.att.com
