<html><body><div>Greetings,<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>I may be missing something fundamental, but I find this behaviour surprising:<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>This will cause an error:<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>node.vpack(node.new("glyph"))<br><br>! This can't happen (vpack).</div><div><br data-mce-bogus="1"></div><div>This will not:<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>node.hpack(node.new("glyph"))</div><div><br data-mce-bogus="1"></div><div>Is this intended? I had thought of vpack and hpack as analogous operations, just differing in how they stacked items.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>I am using LuaTeX as shipped with TeXLive 2020.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Thanks,<br data-mce-bogus="1"></div><div>Robert<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div></body></html>