Modules have attributes, not items.

cthulahoops · cthulahoops · commit c64417654700 · 2019-03-27T10:53:08.000Z
diff --git a/vm/src/stdlib/json.rs b/vm/src/stdlib/json.rs
@@ -199,8 +199,7 @@ pub fn de_pyobject(vm: &VirtualMachine, s: &str) -> PyResult {
     de.deserialize(&mut serde_json::Deserializer::from_str(s))
         .map_err(|err| {
             let json_decode_error = vm
-                .sys_module
-                .get_item("modules")
+                .get_attribute(vm.sys_module.clone(), "modules")
                 .unwrap()
                 .get_item("json")
                 .unwrap()
