Add check for syntactic errors when analyzing files with error checking

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/AnalyzerFacadeForJVM.java

@@ -95,6 +95,10 @@ public enum AnalyzerFacadeForJVM implements AnalyzerFacade {
     public static AnalyzeExhaust analyzeFilesWithJavaIntegrationAndCheckForErrors(
             Project project, Collection<JetFile> files, List<AnalyzerScriptParameter> scriptParameters, Predicate<PsiFile> filesToAnalyzeCompletely,
             @NotNull CompilerDependencies compilerDependencies) {
+        for (JetFile file : files) {
+            AnalyzingUtils.checkForSyntacticErrors(file); 
+        }
+       
         AnalyzeExhaust analyzeExhaust = analyzeFilesWithJavaIntegration(
                 project, files, scriptParameters, filesToAnalyzeCompletely, compilerDependencies, false);
 

compiler/testData/codegen/regressions/kt1953_class.kt

@@ -1,7 +1,7 @@
 class A {
     private val sb: StringBuilder = StringBuilder()
 
-    fun String.plus {
+    fun String.plus() {
         sb.append(this)
     }