[ast-developers] Invalid |free()| valgrind hit with typeset -c in subshell with ast-ksh.2013-05-24+patches...

[Roland Mainz]

Hi!

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I'm getting a valgrind hit (valgrind itself needs to be patched to
work with libast - see
http://lists.research.att.com/pipermail/ast-developers/2013q2/002574.html)
for an invalid |free()| call when typeset -c is used in a subshell
with ast-ksh.2013-05-24+the latest patches for typeset -c from
David...
-- snip --
$ ~/vg/bin/valgrind ~/bin/ksh -c '( typeset -M totitle i="hello" ;
typeset -c y=i ; ) ; typeset -p y'==11399== Memcheck, a memory error
detector
==11399== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al.
==11399== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info
==11399== Command: /home/test001/bin/ksh -c (\ typeset\ -M\ totitle\
i="hello"\ ;\ typeset\ -c\ y=i\ ;\ )\ ;\ typeset\ -p\ y
==11399==
[snip]
==11399==
==11399== Invalid free() / delete / delete[] / realloc()
==11399== at 0x4C29BF2: _ast_free (vg_replace_malloc.c:1001)
==11399== by 0x459422: _nv_unset (name.c:2572)
==11399== by 0x40FFAB: nv_putv (nvdisc.c:159)
==11399== by 0x432AA3: put_trans (init.c:2504)
==11399== by 0x40FF67: nv_putv (nvdisc.c:152)
==11399== by 0x45929B: _nv_unset (name.c:2537)
==11399== by 0x47349C: nv_restore (subshell.c:324)
==11399== by 0x47452B: sh_subshell (subshell.c:624)
==11399== by 0x47D9F1: sh_exec (xec.c:2040)
==11399== by 0x47E2B7: sh_exec (xec.c:2218)
==11399== by 0x40F394: exfile (main.c:599)
==11399== by 0x40E53B: sh_main (main.c:371)
==11399== Address 0x594fd90 is 0 bytes inside a block of size 13 free'd
==11399== at 0x4C29BF2: _ast_free (vg_replace_malloc.c:1001)
==11399== by 0x459422: _nv_unset (name.c:2572)
==11399== by 0x40FFAB: nv_putv (nvdisc.c:159)
==11399== by 0x432AA3: put_trans (init.c:2504)
==11399== by 0x40FF67: nv_putv (nvdisc.c:152)
==11399== by 0x45929B: _nv_unset (name.c:2537)
==11399== by 0x47349C: nv_restore (subshell.c:324)
==11399== by 0x47452B: sh_subshell (subshell.c:624)
==11399== by 0x47D9F1: sh_exec (xec.c:2040)
==11399== by 0x47E2B7: sh_exec (xec.c:2218)
==11399== by 0x40F394: exfile (main.c:599)
==11399== by 0x40E53B: sh_main (main.c:371)
[snip]
-- snip --

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Bye,
Roland