iso-2022-jp decoder, "trail byte" case says to prepend byte in the end of stream step

[mrmixer]

In the iso-2022-jp decoder, in the "trail byte" case, when byte is "end of stream", the spec says to prepend the byte (which is end-of-stream) to the stream. Am I misunderstanding ? If not why are we doing that ?

[annevk]

Because it's an error condition we want to return an error and then reprocess the end-of-stream in the Lead byte byte where it'll return finished.

[mrmixer]

Thanks.