`scrot -sf` stopped working about scrot HOT 3 CLOSED

The --select option now expects an optional argument.

Using the short option (-s) with the optional argument is valid, according to here:
getopt(3) — Linux manual page
Two colons mean an option takes an optional arg; if there is text in the current argv-element (i.e., in the same word as the option name itself, for example, "-oarg"), then it is returned in optarg, otherwise optarg is set to zero.

Ex:
-o arg default argument
-o default argument
-oarg optional argument given

from scrot.

That is a fair point, but it's still the case that scripts that were previously broken (because e.g. they invoke scrot -sf) are now broken.

from scrot.

I don't like breaking behaviors just for the sake of it, but I don't think that's dogma either 🔥
The new features (hide/hold/blur) are tied to selection and the only way the user communicates with us is through arguments and the best place for this was for the --select option to determine the behavior.
Anyway, I see that you already solved the problem easily.

from scrot.