[luatex] Missing catcode info when \tracingassigns positivie

[Joseph Wright]

Hello all,

With minimal example

    {\tracingassigns=1\begingroup\catcode`\+=11\endgroup}
    \bye

pdfTeX writes the expected data to the log:

    {changing \catcode43=12}
    {into \catcode43=11}

and with \tracingall or similar also reports restoring catcodes at the
end of groups. That's not the case with LuaTeX: no catcode logging. Is
this deliberate or a bug? If it's deliberate, what's the reasoning: it's
tricky for doing a diff against  pdfTeX log.
--
Joseph Wright