pull changes

src/ijvm/ops.rs

@@ -216,7 +216,7 @@ fn invokevirtual(machine: &mut Machine) -> Result<()> {
 
     // Lifetime for cur_stack
     {
-        let mut cur_stack = machine.cur_stack();
+        let cur_stack = machine.cur_stack();
         for i in 1..arg_count {
             newframe.set((arg_count - i) as usize, cur_stack.pop()?)?;
         }