Lua syntax bug with local functions

In Lua syntax, a function is detected as a collapsible region when written like so:

function foo()
  dothing()
end

but is not collapsible when the function is made local (which is recommended in most cases):

local function bar()
  do_other_thing()
end

I can try to have a look at what's going on, but I've no experience contributing to KDE so any pointers would be appreciated & I won't mind if someone else takes this on!