ios7 - Xcode 6 Beta not compiling -

ios7 - Xcode 6 Beta not compiling -

i've got next problem: i've written first swift app (for ios7) , worked fine. after changing minor detail (adding string somewhere) wouldn't compile anymore, if changed how before.

there no error message or it, says it's building project (compiling swift source files) it's not progressing @ all, after hours of "building".

i've tried xcode 6 b1 , b2 , both it's same: other projects compiling without problems, 1 get's stuck.

does have clue might problem , how solve it?

debug code manually works me.

finally find root cause of problem many string concatenation in 1 line.

bug code:

var string = string1 + string2 + string3 + string4 + string5 + string6 + string7 + string8

fixed code:

var string = string1 string += string2 string += string3 string += string4 string += string5 string += string6 string += string7 string += string8

xcode ios7 compilation