Angular 1.3 about angular-froala HOT 6 CLOSED

TypeError: html.indexOf is not a function    
at htmlParser (/angular-froala/src/froala-sanitize.js:254:17)    
at $get (/angular-froala/src/froala-sanitize.js:148:7)    
at getTrusted (/angular/angular.js:16764:16)    
at Object.$get.sce.(anonymous function) [as getTrustedHtml] (/angular/angular.js:17444:16)    
at Object.ngBindHtmlWatchAction [as fn] (/angular/angular.js:22374:29)    
at Scope.$get.Scope.$digest (/angular/angular.js:15753:29)    
at safeDigest (/angular-strap/dist/angular-strap.js:3952:70)    
at Object.angular.module.provider.$get.$tooltip.show (/angular-strap/dist/angular-strap.js:3604:11)    
at Object.angular.module.provider.$get.$tooltip.enter (/angular-strap/dist/angular-strap.js:3568:29)    
at HTMLButtonElement.angular.module.provider.$get.$tooltip.toggle (/angular-strap/dist/angular-strap.js:3673:59) undefined

<span ng-bind="number"></span>

function htmlParser( html, handler ) {

    // Added code from newer ngSanitize 1.4.3/1.4.4 version.
    // --- Start ---
    if (typeof html !== 'string') {
        if (html === null || typeof html === 'undefined') {
            html = '';
        } else {
            html = '' + html;
        }
    }
    // --- End ---

  var index, chars, match, stack = [], last = html;
  stack.last = function() { return stack[ stack.length - 1 ]; };