fix(ngInclude): do not compile template if original scope is destroyed

With slow internet connection scope may be destroyed before template is loaded.
Previously in this case ngInclude compiled template that leaded to memory leaks
and errors in some cases.

Closes: #13515
Closes: #13543

src/ng/directive/ngInclude.js

@@ -232,6 +232,8 @@ var ngIncludeDirective = ['$templateRequest', '$anchorScroll', '$animate',
             //set the 2nd param to true to ignore the template request error so that the inner
             //contents and scope can be cleaned up.
             $templateRequest(src, true).then(function(response) {
+              if (scope.$$destroyed) return;
+
               if (thisChangeId !== changeCounter) return;
               var newScope = scope.$new();
               ctrl.template = response;
@@ -253,6 +255,8 @@ var ngIncludeDirective = ['$templateRequest', '$anchorScroll', '$animate',
               currentScope.$emit('$includeContentLoaded', src);
               scope.$eval(onloadExp);
             }, function() {
+              if (scope.$$destroyed) return;
+
               if (thisChangeId === changeCounter) {
                 cleanupLastIncludeContent();
                 scope.$emit('$includeContentError', src);

test/ng/directive/ngIncludeSpec.js

@@ -398,6 +398,26 @@ describe('ngInclude', function() {
   });
 
 
+  it('should not compile template if original scope is destroyed', function() {
+    module(function($provide) {
+      $provide.decorator('$compile', function($delegate) {
+        return jasmine.createSpy('$compile').andCallFake($delegate);
+      });
+    });
+    inject(function($rootScope, $httpBackend, $compile) {
+      $httpBackend.when('GET', 'url').respond('template text');
+      $rootScope.show = true;
+      element = $compile('<div ng-if="show"><div ng-include="\'url\'"></div></div>')($rootScope);
+      $rootScope.$digest();
+      $rootScope.show = false;
+      $rootScope.$digest();
+      $compile.reset();
+      $httpBackend.flush();
+      expect($compile).not.toHaveBeenCalled();
+    });
+  });
+
+
   describe('autoscroll', function() {
     var autoScrollSpy;