osx - OS X Swift Compiler Error - Segmentation Fault -

i making variable declarations in nsviewcontroller custom class. declarations are:

var filtersettings: dictionary<string, string> = ["location": "all", "status": "all", "pprdate": "all", "project manager": "all"] let locationfiltersettings: set = ["all", "newcastle", "sydney", "act & southern nsw", "western sydney", "grafton"] let statusfiltersettings: set = ["all", "active", "inactive"] var pprdatefiltersettings: set<nsdate> = []  // value needs set programiticaly loading available ppr dates --- use pprdatefiltersettings.insert(datevariable) var projectmanagerfiltersettings: set<string> = []  // value needs set programatically loading available pms 

when program compiles 1 error shows in issues navigator: - compiler error not shown against particular line in code.

when go issue navigator shows against class following error. other classes compile correctly no errors:

"swift compiler error command failed due signal: segmentation fault: 11"

i admit not knowing how debug error.

i know if comment out let locationfiltersettings.. line in code compiler error goes away.

i have added code variables shown above , make other reference filtersettings valuable yet. no other changes have been made code compiling , running expected.

any advice on where/how debug issue please let me know. not sure next.

i should add running latest version of xcode , osx.

i have tried playing optional declaration suggested in 1 of answers here:-->swift compiler segmentation fault when building no avail.

edit: additional information.

1. i deleted , re-installed xcode. error still occurred.
2. having declared variables within class wasn't referencing them within functions tried println variables @ few spots in code. error still occurred.
3. i moved declarations global level within class within 1 of functions. error disappeared.

so- 3 above partially solved issue me. wanted variables available through class may need pass them around parameters (which seems work). however, still not understand why error occurring , if syntax thing missing.

ok - have been able compile code without error properties declared @ top of class.

the issue use of short form declaration relying on type of item being inferred.

let propertyname: set = ["item1", "item2"] 

when initialised property using following syntax

let propertyname: set<string> = ["item1", "item2"] 

it compiled without error. short form declaration worked when property declared within function.