"Covariant return type change detected" on discarded return value

[lukehutch]

Given the code:

ByteBuffer byteBuf = getByteBuf();
byteBuf.position(offset);

Animal Sniffer reports:

Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)

This is not a helpful warning, especially as the return value is discarded :-)

[lukehutch]

Actually, I take that back, it's a helpful warning. This causes breakage if you compile if JDK<9 compatibility mode using JDK9+: plasma-umass/doppio#497