Fix potential CCE in LightCodeInsight tests in non-JVM

idea/idea-test-framework/test/org/jetbrains/kotlin/idea/test/KotlinLightCodeInsightFixtureTestCase.kt

@@ -220,7 +220,9 @@ fun configureCompilerOptions(fileText: String, project: Project, module: Module)
         val facetSettings = KotlinFacet.get(module)!!.configuration.settings
 
         if (jvmTarget != null) {
-            (facetSettings.compilerArguments as K2JVMCompilerArguments).jvmTarget = jvmTarget
+            val compilerArguments = facetSettings.compilerArguments
+            require(compilerArguments is K2JVMCompilerArguments) { "Attempt to specify `$JVM_TARGET_DIRECTIVE` for non-JVM test" }
+            compilerArguments.jvmTarget = jvmTarget
         }
 
         if (options != null) {