Fixes an error occurring when a validation error occurs nested in a L…

…istBlock.
wagtail · Feb 26, 2019 · b36564f · b36564f
1 parent 54d33a8
commit b36564f
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/wagtail/core/blocks/utils.py b/wagtail/core/blocks/utils.py
@@ -35,7 +35,9 @@ def get_non_block_errors(errors):
         errors_data = errors_data[0].params
         if errors_data is None:
             return errors
-    return errors_data.get(NON_FIELD_ERRORS, ())
+    if isinstance(errors_data, dict):
+        return errors_data.get(NON_FIELD_ERRORS, ())
+    return ()
 
 
 class BlockData: