[luatex] Strange hyphenation

[Paul Isambert]

  Le 03/10/2010 17:45, Taco Hoekwater a écrit :
> On 10/03/2010 02:52 PM, enrico.gregorio at univr.it wrote:
>>
>> My fmtutil.cnf says
>>
>
> Ok, I managed to fix my installation, and now I get the same bad
> output you did (I had to run fmtutil --byfmt by hand to get a proper
> new format).
>
> The problem is not the word 'determinante' at all. Believe it or not,
> but the acutal problem is the '---' ligature. No _normal_ patterns are
> applied to the current paragraph any more after the first occurence of
> that. Hyphenation exceptions still work, and that is why the second
> paragraph comes out ok.
>
> I need to do some serious thinking on why a ligature can block
> hyphenation :(

Just for the record:

Enrico's text, under plain TeX, with luaotfload and an otf font, is 
hyphenated properly, even with `---' ligatures.
So isn't it LaTeX, or Babel, or anything not related to LuaTeX, that is 
bugged?

Paul