[Bug c++/30975] ptr to member func __delta is 0 if ptr declaration does not match function porototype

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2007-02-26 22:56 -------
Well this is undefined code really.  You are calling the function via the wrong
type.

If you do:
    c.t((FPTR)(FPTR1)&C::C_bad);

And use it as a FPTR1, it works.

FPTR1 is defined as:
typedef void (B::*FPTR1)();


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30975