Empty buffer with "repeated byte" lead to exception

[niicojs]

protobuf.js version: 6.8.0

Using an empty buffer with Message.fromObject leads to exception on compiled JS.

Message.fromObject({ bytesarray: [ Buffer.alloc(0) ] })

TypeError: Cannot read property 'length' of undefined
    at BufferWriter.write_bytes_buffer [as bytes] (c:\Users\nico\Documents\GitHub\sandbox\node_modules\protobufjs\src\writer_buffer.js:50:20)
    at Function.encode (c:\Users\nico\Documents\GitHub\sandbox\node_modules\node-pogo-protos-vnext\compiled.js:53810:77)
    at testEncode (c:\Users\nico\Documents\GitHub\sandbox\index.js:48:22)
    at Object.<anonymous> (c:\Users\nico\Documents\GitHub\sandbox\index.js:51:1)
    at Module._compile (module.js:566:14)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:503:32)
    at tryModuleLoad (module.js:466:12)
    at Function.Module._load (module.js:458:3)
    at Function.Module.runMain (module.js:605:10)
    at startup (bootstrap_node.js:158:16)
    at bootstrap_node.js:575:3

[niicojs]

Actually the error stack may not be accurate. The thing is fromObject()convert Buffer.alloc(0) to undefined, which break another part of my code.
I don't think an empty Buffer should be converted with undefined