Hi all.
I'm new to this forum and before I post my question just want to make sure that this is the right place to ask questions like "Things broken after Xcode 6 Beta 6 release!". I know there's developer forum, but this place looks much nicer :)
Anyway, I'll go ahead and post this one, let me know if this does not belong here or something.

I have a strange new error with beta 6, the error message is like

.../Shared/Model/Rules.swift:310:9: Cannot invoke '&&' with an argument list of type '($T78, $T84)'
.../Shared/Model/Rules.swift:310:9: Expression was too complex to be solved in reasonable time; consider breaking up the expression into distinct sub-expressions

The code in question is this:

func ==(left: Rules, right: Rules) -> Bool {
    return left.numberOfPlayers == right.numberOfPlayers
            && left.numberOfCardsInDeck == right.numberOfCardsInDeck
            && left.pointSystem == right.pointSystem
            && left.numberOfCardsInHand == right.numberOfCardsInHand
            && left.cleanPoints == right.cleanPoints
            && left.playRobbers == right.playRobbers
            && left.maxPoints == right.maxPoints
            && left.canCallRoundEnd == right.canCallRoundEnd
            && left.canLayFaceDown == right.canLayFaceDown
            && left.callMolodkaAnyTime == right.callMolodkaAnyTime
            && left.buraWinsRound == right.buraWinsRound
            && left.moscowWinsRound == right.moscowWinsRound
            && left.numberOfCardsInMoscowCombo == right.numberOfCardsInMoscowCombo
            && left.bigMoscowRank == right.bigMoscowRan
            && left.smallMoscowRank == right.smallMoscowRank
}

As you can see, there's nothing special, just a lengthy piece of code.
It works perfectly with beta 5, but with beta 6 I got an error.
Suddenly Swift compiler got weaker and can't handle long expressions.
I played around and commented some lines, in this example compiler will handle 10 lines nicely, and report an error on 11 or more.

func ==(left: Rules, right: Rules) -> Bool {
    return left.numberOfPlayers == right.numberOfPlayers
            && left.numberOfCardsInDeck == right.numberOfCardsInDeck
            && left.pointSystem == right.pointSystem
            && left.numberOfCardsInHand == right.numberOfCardsInHand
            && left.cleanPoints == right.cleanPoints
            && left.playRobbers == right.playRobbers
            && left.maxPoints == right.maxPoints
            && left.canCallRoundEnd == right.canCallRoundEnd
            && left.canLayFaceDown == right.canLayFaceDown
            && left.callMolodkaAnyTime == right.callMolodkaAnyTime
//            && left.buraWinsRound == right.buraWinsRound
//            && left.moscowWinsRound == right.moscowWinsRound
//            && left.numberOfCardsInMoscowCombo == right.numberOfCardsInMoscowCombo
//            && left.bigMoscowRank == right.bigMoscowRan
//            && left.smallMoscowRank == right.smallMoscowRank
}

Of course I can break it into couple of shorter expressions, but it looks like a bug to me so far.

Hi. I've gotten the same error, and I need to know how to break up an expression into subexpressions, but don't know how. Could you help out a fellow programmer here?

Did you check with Xcode 6 GM?
In any case, just break it into a smaller bits, for example

return a == b && c == d && e == f && g == h

break it like this

let condition1 = (a == b && c == d)
let condition2 = (e == f && g == h)
return condition1 && condition2

I didn't check the problem yet, but I though this is something Apple would fix with GM.