There is no good reason to register a variable name, just to unset
that value that could not even be set without the variable existing.

This change should be safe, may be backported if desired.
---
 src/hlua.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/hlua.c b/src/hlua.c
index ed987d50b..b5bf64632 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -3512,7 +3512,7 @@ __LJMP static int hlua_applet_tcp_unset_var(lua_State *L)
 
        /* Unset the variable. */
        smp_set_owner(&smp, s->be, s->sess, s, 0);
-       vars_unset_by_name(name, len, &smp);
+       vars_unset_by_name_ifexist(name, len, &smp);
        return 0;
 }
 
@@ -3990,7 +3990,7 @@ __LJMP static int hlua_applet_http_unset_var(lua_State *L)
 
        /* Unset the variable. */
        smp_set_owner(&smp, s->be, s->sess, s, 0);
-       vars_unset_by_name(name, len, &smp);
+       vars_unset_by_name_ifexist(name, len, &smp);
        return 0;
 }
 
@@ -5074,7 +5074,7 @@ __LJMP static int hlua_unset_var(lua_State *L)
 
        /* Unset the variable. */
        smp_set_owner(&smp, htxn->p, htxn->s->sess, htxn->s, htxn->dir & 
SMP_OPT_DIR);
-       vars_unset_by_name(name, len, &smp);
+       vars_unset_by_name_ifexist(name, len, &smp);
        return 0;
 }
 
-- 
2.26.2


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