y1chi opened a new pull request #12029: URL: https://github.com/apache/beam/pull/12029
Fix NPE in FnApiStateAccessor.java when using VoidCoder, this is because
currentArg for VoidCoder will always to null, and the underneath function will
never be applied, which leads to null
memoizedResult.
Also adds length prefix to VoidCoder since it is treated as non-standard
coder in FnApi.
------------------------
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