[Fix] no-namespace: avoid crash on non-string createElement values

Fixes #3085

Author: ljharb

CHANGELOG.md

@@ -7,10 +7,12 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 
 ### Fixed
 * [`no-namespace`]: fix crash on non-string React.createElement name ([#3082] @ljharb)
+* [`no-namespace`]: avoid crash on non-string createElement values ([#3085] @ljharb)
 
 ### Changed
 * [Docs] [`jsx-max-props-per-line`]: fix options example ([#3083] @MrRaiter)
 
+[#3085]: https://github.com/yannickcr/eslint-plugin-react/issue/3085
 [#3083]: https://github.com/yannickcr/eslint-plugin-react/pull/3083
 [#3082]: https://github.com/yannickcr/eslint-plugin-react/pull/3082
 

lib/rules/no-namespace.js

@@ -40,7 +40,7 @@ module.exports = {
       CallExpression(node) {
         if (isCreateElement(node, context) && node.arguments.length > 0 && node.arguments[0].type === 'Literal') {
           const name = node.arguments[0].value;
-          if (!name || name.indexOf(':') === -1) return undefined;
+          if (typeof name !== 'string' || name.indexOf(':') === -1) return undefined;
           report(context, messages.noNamespace, 'noNamespace', {
             node,
             data: {
@@ -51,7 +51,7 @@ module.exports = {
       },
       JSXOpeningElement(node) {
         const name = elementType(node);
-        if (!name || name.indexOf(':') === -1) return undefined;
+        if (typeof name !== 'string' || name.indexOf(':') === -1) return undefined;
         report(context, messages.noNamespace, 'noNamespace', {
           node,
           data: {

tests/lib/rules/no-namespace.js

@@ -76,6 +76,10 @@ ruleTester.run('no-namespace', rule, {
     code: 'React.createElement("Object.TestComponent")'
   }, {
     code: 'React.createElement(null)'
+  }, {
+    code: 'React.createElement(true)'
+  }, {
+    code: 'React.createElement({})'
   }],
 
   invalid: [{