Work around crashing redbox

Summary: When debugging supporting a Fabric component, a redbox was being shown without a title which resulted in an infinite redbox loop, followed by OOM. That isn't helpful so we just safely work around the null title while indicating what happened to aid in debugging.

Reviewed By: lunaleaps

Differential Revision: D16921053

fbshipit-source-id: df1f4a691df0c10de53c91e4a9356a04a9005a97

ReactAndroid/src/main/java/com/facebook/react/devsupport/RedBoxDialog.java

@@ -122,6 +122,8 @@ private FrameViewHolder(View v) {
     public StackAdapter(String title, StackFrame[] stack) {
       mTitle = title;
       mStack = stack;
+      Assertions.assertNotNull(mTitle);
+      Assertions.assertNotNull(mStack);
     }
 
     @Override
@@ -169,7 +171,8 @@ public View getView(int position, View convertView, ViewGroup parent) {
                     LayoutInflater.from(parent.getContext())
                         .inflate(R.layout.redbox_item_title, parent, false);
         // Remove ANSI color codes from the title
-        title.setText(mTitle.replaceAll("\\x1b\\[[0-9;]*m", ""));
+        String titleSafe = (mTitle == null ? "<unknown title>" : mTitle);
+        title.setText(titleSafe.replaceAll("\\x1b\\[[0-9;]*m", ""));
         return title;
       } else {
         if (convertView == null) {