I finally took the time to fix this for Ada as well.  Initially,
I just fixed it for "task", until I realized that I should have
fixed it for both "thread" and "task". Hence two patches instead
of just one.

2010-01-01  Joel Brobecker  <brobecker@adacore.com>

        Fix break *FUN'address task NUM.
        * ada-lex.l (task): New rule.
        * ada-lang.c (valid_task_id): Make sure the Ada task list has
        been built before using it.

2010-01-01  Joel Brobecker  <brobecker@adacore.com>

        Fix break *FUN'address thread NUM.
        * ada-lex.l (task): Expand rule to also match the thread keyword.

Tested on x86_64-linux.

-- 
Joel