all array stores and a missed error

src/heap.rs

@@ -1,9 +1,10 @@
-use std::cell::{RefCell, UnsafeCell};
-use crate::class::{Class, Value};
+use std::cell::UnsafeCell;
 use std::collections::HashMap;
 use std::fmt;
 use std::rc::Rc;
 use std::sync::Arc;
+
+use crate::class::{Class, Value};
 use crate::classloader::CpEntry;
 
 pub struct Object {

src/vm.rs

@@ -418,6 +418,7 @@ impl Vm {
                             array[*index as usize] = value.clone();
                         }
                     }
+                    ObjectRef::Object(_) => {}
                 }
             }
         }