- [x] I have searched the [issues](https://github.com/apache/dubbo/issues) of
this repository and believe that this is not a duplicate.
- [x] I have checked the
[FAQ](https://github.com/apache/dubbo/blob/master/FAQ.md) of this repository
and believe that this is not a duplicate.
### Environment
branch: master
functions take & put in org.apache.dubbo.common.utils.Stack consider no the
situation that index plus mSize is negative .
```java
public E get(int index) {
if (index >= mSize) {
throw new IndexOutOfBoundsException("Index: " + index + ", Size: "
+ mSize);
}
return index < 0 ? mElements.get(index + mSize) : mElements.get(index);
}
public E set(int index, E value) {
if (index >= mSize) {
throw new IndexOutOfBoundsException("Index: " + index + ", Size: "
+ mSize);
}
return mElements.set(index < 0 ? index + mSize : index, value);
}
public E remove(int index) {
if (index >= mSize) {
throw new IndexOutOfBoundsException("Index: " + index + ", Size: "
+ mSize);
}
E ret = mElements.remove(index < 0 ? index + mSize : index);
mSize--;
return ret;
}
```
the implementations are not strict.
[ Full content available at: https://github.com/apache/dubbo/issues/5215 ]
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