···<date: 2013-06-27, Thursday>···<from: Philipp Gesang>···

> Hi Hans,
> 
> this has been reported by Dohyun Kim [1]: the generic fontloader
> (not Context) serializes some tounicode values as Lua numbers,
> not strings. When re-reading the cache file the values lose all
> leading zeros, so they are no longer well-formed UTF-16BE.
> 
>     ...
>       ["tounicode"]={
>        [2329]="E001",
>     ...
>        [2384]="0063006B",   -- <-- correct
>        [2385]=00630068,     -- <-- invalid
>        [2386]=00740074,
>        [2387]=00630074,
>        [2388]="017F0069",
>     ...
> 
> Best regards,
> Philipp
> 
> [1] https://github.com/lualatex/luaotfload/issues/102
>     (Kim’s example works with luatex-plain if you comment out the
>     ``\input luaotfload.sty`` line.)

I’ve traced it to luatex-basics-gen.lua. The cache is compiled
with the spec “{reduce = true}” which causes values to be
analyzed and “tonumber()”ed. If I unset the reduce flag, the
values turn out correct in the PDF.

Best,
Philipp