Don't fill stacktrace for control flow exceptions.

platform/lang-api/src/com/intellij/util/xml/NanoXmlUtil.java

@@ -336,6 +336,10 @@ public class NanoXmlUtil {
   }
 
   public static class ParserStoppedException extends RuntimeException {
+    @Override
+    public Throwable fillInStackTrace() {
+      return this;
+    }
   }
 
   private static class RootTagInfoBuilder implements IXMLBuilder {