nl_tokens: Computes a stack trace for an exception .
pl_tokens: function computeStackTrace ( ex , depth ) { var stack = null ; depth = depth == null ? 0 : + <mask> ; try { stack = computeStackTraceFromStackProp ( ex ) ; if ( stack ) { return stack ; } } catch ( e ) { if ( TraceKit . debug ) { throw e ; } } try { stack = computeStackTraceByWalkingCallerChain ( ex , depth + 1 ) ; if ( stack ) { return stack ; } } catch ( e ) { if ( TraceKit . debug ) { throw e ; } } return { name : ex . name , message : ex . message , url : getLocationHref ( ) } ; }