@rdipardo ok, thanks for the pointer, problem found 09706bdf8bd61f740a053aa1ea709fc4f65845c5 forces use of `%f` [here](https://github.com/geany/geany/blob/48d4f58966ea81a06e77b9f75079dc989f4636ea...) but clearly only latest Glibses support it.
@eht16 its your change, do you want to revert it or can you somehow test its availability in the runtime Glib?