Disable render helper in block form.

packages/ember-template-compiler/lib/index.js

@@ -14,7 +14,7 @@ import TransformAngleBracketComponents from 'ember-template-compiler/plugins/tra
 import TransformInputOnToOnEvent from 'ember-template-compiler/plugins/transform-input-on-to-onEvent';
 import TransformTopLevelComponents from 'ember-template-compiler/plugins/transform-top-level-components';
 import DeprecateRenderModel from 'ember-template-compiler/plugins/deprecate-render-model';
-import DeprecateRenderBlock from 'ember-template-compiler/plugins/deprecate-render-block';
+import PreventRenderBlock from 'ember-template-compiler/plugins/prevent-render-block';
 import TransformInlineLinkTo from 'ember-template-compiler/plugins/transform-inline-link-to';
 import AssertNoViewAndControllerPaths from 'ember-template-compiler/plugins/assert-no-view-and-controller-paths';
 import AssertNoViewHelper from 'ember-template-compiler/plugins/assert-no-view-helper';
@@ -33,7 +33,7 @@ registerPlugin('ast', TransformAngleBracketComponents);
 registerPlugin('ast', TransformInputOnToOnEvent);
 registerPlugin('ast', TransformTopLevelComponents);
 registerPlugin('ast', DeprecateRenderModel);
-registerPlugin('ast', DeprecateRenderBlock);
+registerPlugin('ast', PreventRenderBlock);
 registerPlugin('ast', AssertNoEachIn);
 registerPlugin('ast', TransformInlineLinkTo);
 

packages/ember-template-compiler/lib/plugins/prevent-render-block.js

@@ -0,0 +1,33 @@
+import Error from 'ember-metal/error';
+import calculateLocationDisplay from
+  'ember-template-compiler/system/calculate-location-display';
+
+export default function PreventRenderBlock(options) {
+  this.syntax = null;
+  this.options = options;
+}
+
+PreventRenderBlock.prototype.transform =
+  function PreventRenderBlock_transform(ast) {
+  let moduleName = this.options.moduleName;
+  let walker = new this.syntax.Walker();
+
+  walker.visit(ast, function(node) {
+    if (!validate(node)) { return; }
+
+    throw new Error(assertionMessage(moduleName, node));
+  });
+
+  return ast;
+};
+
+function validate(node) {
+  return (node.type === 'BlockStatement') &&
+    (node.path.original === 'render');
+}
+
+function assertionMessage(moduleName, node) {
+  let sourceInformation = calculateLocationDisplay(moduleName, node.loc);
+
+  return `Usage of \`render\` in block form is unsupported ${sourceInformation}.`;
+}

packages/ember-template-compiler/tests/plugins/deprecate-render-block-test.js

@@ -6,12 +6,12 @@ if (!isEnabled('ember-glimmer')) {
 
   QUnit.module('ember-template-compiler: deprecate-render-block');
 
-  QUnit.test('Using `render` with a block issues a deprecation', function() {
+  QUnit.test('Using `render` with a block throws an error', function() {
     expect(1);
 
-    let expectedMessage = `Usage of \`render\` in block form is deprecated ('baz/foo-bar' @ L1:C0) .`;
+    let expectedMessage = `Usage of \`render\` in block form is unsupported ('baz/foo-bar' @ L1:C0) .`;
 
-    expectDeprecation(function() {
+    throws(function() {
       compile('{{#render "foo-bar"}}{{/render}}', {
         moduleName: 'baz/foo-bar'
       });