BUG/MEDIUM: lua: fix crash when using bogus mode in register_service()

When using an incorrect 'mode' as 2nd argument of core.register_service(),
HAProxy crashes while displaying the error message.

To be backported to 1.8, 1.7 and 1.6.

diff --git a/src/hlua.c b/src/hlua.c
index 2c28e67..abd096d 100644 (file)
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -6871,7 +6871,7 @@ __LJMP static int hlua_register_service(lua_State *L)
                akl->kw[0].parse = action_register_service_http;
        else
                WILL_LJMP(luaL_error(L, "lua service environment '%s' is unknown. "
-                                       "'tcp' or 'http' are expected."));
+                                       "'tcp' or 'http' are expected.", env));
 
        akl->kw[0].match_pfx = 0;
        akl->kw[0].private = fcn;