>> In any case, it is the wrong :version, since this won't be in 24.4.
> Isn't the Emacs trunk currently at version 24.4.XX.X? IIUC,

24.4.XX.X is "strictly greater than 24.4".  More specifically NN.MM.50.Y
is the development code for NN.MM+1 and NN.MM.9X.Y is the pretest (aka
"beta test" for NN.MM+1.

IOW, the trunk will be released as 24.5.


        Stefan