Added fail-safe

app/src/main/java/eu/faircode/email/EditTextCompose.java

@@ -123,6 +123,7 @@ public class EditTextCompose extends FixedEditText {
 
             @Override
             public void onTextChanged(CharSequence text, int start, int before, int count) {
+                try {
                     int index = start + before;
                     if (count - before == 1 && index > 1) {
                         char c = text.charAt(index);
@@ -140,6 +141,9 @@ public class EditTextCompose extends FixedEditText {
                             what = "←";
                         }
                     }
+                } catch (Throwable ex) {
+                    Log.e(ex);
+                }
             }
 
             @Override