[XeTeX] ifcat changed?

[Ulrike Fischer]

Am Sat, 15 Apr 2017 07:26:38 -0400 schrieb Bruno Le Floch:

> The primitive conditional "\ifcat\relax\cr true\else false\fi" gives
> "true" in pdfTeX, LuaTeX, (e)(u)pTeX, and XeTeX from some time ago
> (could be years),

Looks like *many* years. I get the wrong output with texlive 2012. 

> It would be useful for me to know which of \ifcat, \relax, and \cr
> changed, 

It looks like a problem with \cr for me, but it is difficult to be
sure. 

-- 
Ulrike Fischer 
http://www.troubleshooting-tex.de/