disable "create switch" intention on red code

which otherwise would lead to exceptions in the intention

java/java-impl/src/com/intellij/codeInsight/intention/impl/CreateSwitchIntention.java

@@ -50,6 +50,7 @@ public class CreateSwitchIntention extends BaseElementAtCaretIntentionAction {
     PsiExpressionStatement expressionStatement = PsiTreeUtil.getParentOfType(element, PsiExpressionStatement.class, false);
     return expressionStatement != null &&
            expressionStatement.getParent() instanceof PsiCodeBlock &&
+           PsiTreeUtil.findChildOfType(expressionStatement.getExpression(), PsiErrorElement.class) == null &&
            isValidTypeForSwitch(expressionStatement.getExpression().getType(), expressionStatement);
   }
 

java/java-tests/testData/codeInsight/createSwitch/notAvailableOnRedCode.java

@@ -0,0 +1,5 @@
+class Test {
+  void m() {
+    toS<caret>tring(foo() (String) o);
+  }
+}

java/java-tests/testSrc/com/intellij/java/codeInsight/intention/CreateSwitchTest.java

@@ -40,7 +40,7 @@ public class CreateSwitchTest extends JavaCodeInsightFixtureTestCase {
   }
 
   public void testString() {
-    doTestString();
+    withJava7(this::doTest);
   }
 
   public void testPrimitive() {
@@ -58,13 +58,17 @@ public class CreateSwitchTest extends JavaCodeInsightFixtureTestCase {
   public void testNotAvailableInForUpdate() {
     doTestNotAvailable();
   }
+  
+  public void testNotAvailableOnRedCode() {
+    withJava7(this::doTestNotAvailable);
+  }
 
-  private void doTestString() {
+  private void withJava7(Runnable runnable) {
     final LanguageLevelProjectExtension languageLevelProjectExtension = LanguageLevelProjectExtension.getInstance(getProject());
     final LanguageLevel oldLanguageLevel = languageLevelProjectExtension.getLanguageLevel();
     languageLevelProjectExtension.setLanguageLevel(LanguageLevel.JDK_1_7);
     try {
-      doTest();
+      runnable.run();
     }
     finally {
       languageLevelProjectExtension.setLanguageLevel(oldLanguageLevel);