typo fix + remove ReportError

Runtime/foundation/debug.cs

     public static class D {
 
         public static void logError(string message, Exception ex = null) {
-            Debug.LogException(new ReportError(message, ex));
+            Debug.LogException(new AssertionError(message, ex));
         }
         [Conditional("UIWidgets_DEBUG")]
         public static void assert(Func<bool> result, string message = null) {
 
     [Serializable]
     public class AssertionError : Exception {
+        readonly Exception innerException;
+        
-        public override string StackTrace {
-            get {
-                var stackTrace = base.StackTrace;
-                var lines = stackTrace.Split('\n');
-                var strippedLines = lines.Skip(1);
-
-                return string.Join("\n", strippedLines);
-            }
-        }
-    }
-    
-    
-    public class ReportError : Exception {
-        Exception ex;
-        public ReportError(string message, Exception ex = null) : base(message) {
-            this.ex = ex;
+        public AssertionError(string message, Exception innerException = null) : base(message) {
+            this.innerException = innerException;
-                if (this.ex != null) {
-                    return this.ex.StackTrace;
+                if (this.innerException != null) {
+                    return this.innerException.StackTrace;
                 }
                 
                 var stackTrace = base.StackTrace;
                 return string.Join("\n", strippedLines);
             }
         }
-        
     }
 }

Runtime/widgets/app.cs

         public readonly Dictionary<string, WidgetBuilder> routes;
         public readonly TextStyle textStyle;
         public readonly Window window;
-        public readonly bool showPerformanceoverlay;
+        public readonly bool showPerformanceOverlay;
         public readonly Locale locale;
         public readonly List<LocalizationsDelegate> localizationsDelegates;
         public readonly LocaleListResolutionCallback localeListResolutionCallback;
             this.localeListResolutionCallback = localeListResolutionCallback;
             this.localeResolutionCallback = localeResolutionCallback;
             this.supportedLocales = supportedLocales;
-            this.showPerformanceoverlay = showPerformanceOverlay;
+            this.showPerformanceOverlay = showPerformanceOverlay;
 
             D.assert(
                 home == null ||
             }
 
             PerformanceOverlay performanceOverlay = null;
-            if (this.widget.showPerformanceoverlay) {
+            if (this.widget.showPerformanceOverlay) {
                 performanceOverlay = PerformanceOverlay.allEnabled();
             }