util.error: Fix error on conversion of invalid error stanza, fix #1805
Error stanzas should have an <error> element, but if you pass a
stanza without one to util.error.from_stanza() it triggers an attempt to
index a nil value, which this patch avoids.
In the conditional, it should be safe to assume error_tag is non-nil
since condition can't have those values then.
-- Enables SQL query logging
--
-- luacheck: ignore 213/uri
module:set_global();
local engines = module:shared("/*/sql/connections");
for uri, engine in pairs(engines) do
engine:debug(true);
end
setmetatable(engines, {
__newindex = function (t, uri, engine)
engine:debug(true);
rawset(t, uri, engine);
end
});
function module.unload()
setmetatable(engines, nil);
for uri, engine in pairs(engines) do
engine:debug(false);
end
end