Readied actions, spellcasters, and... spellcraft?

[seebs]

PRD wrote:

If you damage the spellcaster, she may lose the spell she was trying to cast (as determined by her Spellcraft check result).

Spellcraft?

When's spellcraft involved?

EDIT: In 3.5E, it said "concentration check result".

I infer that Pathfinder went through a period where the intent was to use Spellcraft for that, but then it got replaced with the Concentration Check mechanic.

[Claxon]

That seems like a legit error that has persisted for a really really long time