[tex-live] TL'16 pretest luatex fails with

[Karl Berry]

   Though I've located the file "luajittex.fmt" at
   $TEXMFSYSVAR/web2c/luajittex/luajittex.fmt.

If $TEXMFSYSVAR/web2c/luajittex/luajittex.log exists, what's in it?
Any indication of the error?

If not, try running the given command from the command line and see what
happens.

Both the initial installation and subsequent fmtutil-sys --all do work
with me, including luajittex, so it is at least possible ... --karl