From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Mon, 17 Sep 2018 18:42:56 +0300
From: Vladimir Davydov <vdavydov.dev@gmail.com>
Subject: Re: [tarantool-patches] [PATCH] lua: fix assertion failure after
 improper box.schema.user:passwd() call
Message-ID: <20180917154256.ujn4jpm56hx2njnp@esperanza>
References: <20180910133643.22656-1-sergepetrenko@tarantool.org>
 <20180914151752.f7f2nwa5dtpu334u@esperanza>
 <B81E047D-2541-4413-AEE3-5951F6E4C1E7@tarantool.org>
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In-Reply-To: <B81E047D-2541-4413-AEE3-5951F6E4C1E7@tarantool.org>
To: Serge Petrenko <sergepetrenko@tarantool.org>
Cc: tarantool-patches@freelists.org
List-ID: <tarantool-patches.dev.tarantool.org>

On Mon, Sep 17, 2018 at 05:48:53PM +0300, Serge Petrenko wrote:
> diff --git a/src/box/lua/session.c b/src/box/lua/session.c
> index b2e1400b6..7541da0a7 100644
> --- a/src/box/lua/session.c
> +++ b/src/box/lua/session.c
> @@ -201,8 +201,11 @@ lbox_session_su(struct lua_State *L)
>  	/* Restore the original credentials. */
>  	fiber_set_user(fiber(), old_credentials);
>  
> -	if (error)
> +	if (error) {
> +		luaT_toerror(L);
>  		luaT_error(L);
> +	}
> +

Turns out we can simply use lua_error() instead.
I fixed it and pushed the patch to 1.10.