From: Peter Stephenson <p.stephenson@samsung.com>
To: <zsh-workers@zsh.org>
Subject: Re: Segmentation fault immediately after 'unset PATH'
Date: Thu, 11 Jul 2019 11:58:50 +0100 [thread overview]
Message-ID: <1562842730.4950.19.camel@samsung.com> (raw)
In-Reply-To: <1562842103.4950.12.camel@samsung.com>
On Thu, 2019-07-11 at 11:48 +0100, Peter Stephenson wrote:
> diff --git a/Src/params.c b/Src/params.c
> index 1859c7c12..95181f533 100644
> --- a/Src/params.c
> +++ b/Src/params.c
> @@ -3617,10 +3617,18 @@ unsetparam_pm(Param pm, int altflag, int exp)
> altpm = (Param) paramtab->getnode(paramtab, altremove);
> /* tied parameters are at the same local level as each other */
> oldpm = NULL;
> - while (altpm && altpm->level > pm->level) {
> - /* param under alternate name hidden by a local */
> - oldpm = altpm;
> - altpm = altpm->old;
> + /*
> + * Look for param under alternate name hidden by a local.
> + * If this parameter is special, however, the visible
> + * parameter is the special and the hidden one is keeping
> + * and old value --- we just mark the visible one as unset.
> + */
> + if (altpm && !(altpm->node.flags & PM_SPECIAL))
> + {
> + while (altpm && altpm->level > pm->level) {
> + oldpm = altpm;
> + altpm = altpm->old;
> + }
> }
> if (altpm) {
> if (oldpm && !altpm->level) {
Hmm... can that loop I've "if"ed out ever be right? It's meaning we're
unsetting the saved version of a parameter, not the visible one. That
looks pretty fishy at any time.
pws
prev parent reply other threads:[~2019-07-11 10:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-10 20:55 Shane Squires
2019-07-10 21:52 ` Mikael Magnusson
2019-07-11 8:44 ` Peter Stephenson
2019-07-11 10:48 ` Peter Stephenson
2019-07-11 10:58 ` Peter Stephenson [this message]
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