81a7d1413b
Motivation: The `AbstractByteBuf#equals` method doesn't take into account the class of buffer instance. So the two buffers with different classes must have the same `hashCode` values if `equals` method returns `true`. But `EmptyByteBuf#hashCode` is not consistent with `#hashCode` of the empty `AbstractByteBuf`, that is violates the contract and can lead to errors. Modifications: Return `1` in `EmptyByteBuf#hashCode`. Result: Consistent behavior of `EmptyByteBuf#hashCode` and `AbstractByteBuf#hashCode`. |
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