@MockContainer 注解对于继承类的void方法不能正常生效

被mock类：
/**
* 演示使用@MockContainer注解实现Mock容器类的多重继承
* Demonstrate multiple inherit of mock container class with @MockContainer annotation
*/
public class DemoMultipleInherit {

private String prefix() {
return "ori_";
}

private String middle() {
return "gin";
}

public void ss(){
System.out.println("abd");
}

private String suffix(int some, String more, Object[] parameters) {
return "_al";
}

public String entry() {
return prefix() + middle() + suffix(0, null, null);
}

}

mock类代码：

/**
* 演示使用@MockContainer注解实现Mock容器类的多重继承
* Demonstrate multiple inherit of mock container class with @MockContainer annotation
*/
class DemoMultipleInheritTest {

private DemoMultipleInherit demoMultipleInherit = new DemoMultipleInherit();

public static class PrefixMock {
@MockInvoke(targetClass = DemoMultipleInherit.class)
private String prefix() {
return "in_";
}
}

public static class SuffixMock {
@MockInvoke(targetClass = DemoMultipleInherit.class)
private String suffix(int some, String more, Object[] parameters) {
return "_it";
}

@MockInvoke(targetClass = DemoMultipleInherit.class)
private void ss(){
System.out.println("aaaddd");
}
}

@MockContainer(inherits = { PrefixMock.class, SuffixMock.class })
public static class Mock {
@MockInvoke(targetClass = DemoMultipleInherit.class)
private String middle() {
return "her";
}
}

@Test
public void should_use_mock_method_in_parent_class() {
assertEquals("in_her_it", demoMultipleInherit.entry());
demoMultipleInherit.ss();
verifyInvoked("prefix").withTimes(1);
verifyInvoked("middle").withTimes(1);
verifyInvoked("suffix").withTimes(1);
}
}

异常提示：
java.lang.VerifyError: Operand stack underflow
Exception Details:
Location:
com/alibaba/demo/inherit/DemoMultipleInheritTest$Mock.ss(Lcom/alibaba/demo/inherit/DemoMultipleInherit;)V @7: areturn
Reason:
Attempt to pop empty stack.
Current Frame:
bci: @7
flags: { }
locals: { 'com/alibaba/demo/inherit/DemoMultipleInheritTest$Mock', 'com/alibaba/demo/inherit/DemoMultipleInherit' }
stack: { }
Bytecode:
0x0000000: b800 392b b600 3fb0

Reproduce the case in DemoMultipleInheritTest using DemoMultipleInherit, especially the inherited SuffixMock.ss method. Inspect the generated DemoMultipleInheritTest$Mock.ss bytecode and its handling of void methods, then add a regression test showing that ss() runs without VerifyError while the existing mock methods still work.

Written by the indexing model from the issue text.