fix($compile): reference correct directive name in ctreq error

Previously, ctreq would possibly reference the incorrect directive name,
due to relying on a directiveName living outside of the closure which
throws the exception, which can change before the call is ever made.

This change saves the current value of directiveName as a property of
the link function, which prevents this from occurring.

Closes #7062
Closes #7067

Author: caitp

src/ng/compile.js

@@ -1344,6 +1344,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
         if (pre) {
           if (attrStart) pre = groupElementsLinkFnWrapper(pre, attrStart, attrEnd);
           pre.require = directive.require;
+          pre.directiveName = directiveName;
           if (newIsolateScopeDirective === directive || directive.$$isolateScope) {
             pre = cloneAndAnnotateFn(pre, {isolateScope: true});
           }
@@ -1352,6 +1353,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
         if (post) {
           if (attrStart) post = groupElementsLinkFnWrapper(post, attrStart, attrEnd);
           post.require = directive.require;
+          post.directiveName = directiveName;
           if (newIsolateScopeDirective === directive || directive.$$isolateScope) {
             post = cloneAndAnnotateFn(post, {isolateScope: true});
           }
@@ -1360,7 +1362,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
       }
 
 
-      function getControllers(require, $element, elementControllers) {
+      function getControllers(directiveName, require, $element, elementControllers) {
         var value, retrievalMethod = 'data', optional = false;
         if (isString(require)) {
           while((value = require.charAt(0)) == '^' || value == '?') {
@@ -1386,7 +1388,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
         } else if (isArray(require)) {
           value = [];
           forEach(require, function(require) {
-            value.push(getControllers(require, $element, elementControllers));
+            value.push(getControllers(directiveName, require, $element, elementControllers));
           });
         }
         return value;
@@ -1529,7 +1531,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
           try {
             linkFn = preLinkFns[i];
             linkFn(linkFn.isolateScope ? isolateScope : scope, $element, attrs,
-                linkFn.require && getControllers(linkFn.require, $element, elementControllers), transcludeFn);
+                linkFn.require && getControllers(linkFn.directiveName, linkFn.require, $element, elementControllers), transcludeFn);
           } catch (e) {
             $exceptionHandler(e, startingTag($element));
           }
@@ -1549,7 +1551,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
           try {
             linkFn = postLinkFns[i];
             linkFn(linkFn.isolateScope ? isolateScope : scope, $element, attrs,
-                linkFn.require && getControllers(linkFn.require, $element, elementControllers), transcludeFn);
+                linkFn.require && getControllers(linkFn.directiveName, linkFn.require, $element, elementControllers), transcludeFn);
           } catch (e) {
             $exceptionHandler(e, startingTag($element));
           }

test/ng/compileSpec.js

@@ -3509,6 +3509,27 @@ describe('$compile', function() {
         expect(element.text()).toBe('Hello');
       });
     });
+
+
+    it('should throw ctreq with correct directive name, regardless of order', function() {
+      module(function($compileProvider) {
+        $compileProvider.directive('aDir', valueFn({
+          restrict: "E",
+          require: "ngModel",
+          link: noop
+        }));
+      });
+      inject(function($compile, $rootScope) {
+        expect(function() {
+          // a-dir will cause a ctreq error to be thrown. Previously, the error would reference
+          // the last directive in the chain (which in this case would be ngClick), based on
+          // priority and alphabetical ordering. This test verifies that the ordering does not
+          // affect which directive is referenced in the minErr message.
+          element = $compile('<a-dir ng-click="foo=bar"></a-dir>')($rootScope);
+        }).toThrowMinErr('$compile', 'ctreq',
+            "Controller 'ngModel', required by directive 'aDir', can't be found!");
+      });
+    });
   });