Fix NPE in KotlinRunConfiguration & do not throw exception on unknown container type (EA-209426)

idea/idea-jvm/src/org/jetbrains/kotlin/idea/run/KotlinRunConfiguration.java

@@ -277,6 +277,7 @@ public class KotlinRunConfiguration extends JetRunConfiguration {
 
     private void updateMainClassName(PsiElement element) {
         KtDeclarationContainer container = KotlinRunConfigurationProducer.Companion.getEntryPointContainer(element);
+        if (container == null) return;
         String name = KotlinRunConfigurationProducer.Companion.getStartClassFqName(container);
         if (name != null) {
             MAIN_CLASS_NAME = name;

idea/idea-jvm/src/org/jetbrains/kotlin/idea/run/KotlinRunConfigurationProducer.kt

@@ -101,7 +101,7 @@ class KotlinRunConfigurationProducer : RunConfigurationProducer<KotlinRunConfigu
                     container.toLightClass()?.let { ClassUtil.getJVMClassName(it) }
                 }
             }
-            else -> throw IllegalArgumentException("Invalid entry-point container: " + (container as PsiElement).text)
+            else -> null
         }
 
         private fun PsiElement.declarationContainer(strict: Boolean): KtDeclarationContainer? {