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Java 9 introduced something called "covariant return types". This gets used in java.nio.ByteBuffer: overriden methods from java.nio.Buffer now return ByteBuffer instead of more general Buffer. Unfortunately this breaks bytecode generation for the memory: ByteBuffer::limit cannot be casted to ByteBuffer.(Int) -> Buffer. It can be casted to ByteBuffer.(Int) -> ByteBuffer, but not in java 8. The fix is easy enough: upcast the object to Buffer before calling the method. In bytecode this corresponds to using Buffer::limit method instead of ByteBuffer::limit. This works both with older and newer java. The same applies to Buffer::position
cretz
approved these changes
Jun 16, 2023
Owner
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Blind approving/merging because I don't work on this project as much anymore. Thanks! |
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Hey guys could you please release the new version with the fix? |
Owner
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I will set a reminder to make a release. It may be a while since I don't work on this much anymore. |
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Java 9 introduced something called "covariant return types". This gets used in
java.nio.ByteBuffer: overridden methods fromjava.nio.Buffernow returnByteBufferinstead of more generalBuffer. Unfortunately this breaks bytecode generation for the memory:ByteBuffer::limitcannot be casted toByteBuffer.(Int) -> Buffer. It can be casted toByteBuffer.(Int) -> ByteBuffer, but not in java 8.The fix is easy enough: upcast the object to Buffer before calling the method. In bytecode this corresponds to using Buffer::limit method instead of
ByteBuffer::limit. This works both with older and newer java.The same applies to Buffer::position
Arguably, one can change other references to
ByteBuffermethods to the parentBufferinterface, but I decided to keep the changes minimal.Closes #28. Supersedes #31.