Can confirm. The error messages bear little resemblance to the actual problem. Just yesterday I tried to apply Texinfo patches to support generating Chinese P

Can confirm. The error messages bear little resemblance to the actual problem. Just yesterday I tried to apply Texinfo patches to support generating Chinese PDFs via XeTeX. The first error I got was an out-of-memory error, which was solved only by adding a missing font file. The next error I got is "Undefined control sequence." and there's nothing wrong with the sources. I'm maintaining a modular installation of TeX Live for GNU Guix for years now, and understanding the errors doesn't ever seem to get easier. My experience with lout (another typesetting system) has been a lot smoother, even though by default it does not support Unicode. (It's possible with some configuration.)