[1.7.x] Fixed #24008 -- Fixed ValidationError crash with list of dicts.

Backport of 7a878ca5cb50ad65fc465cb263a44cc93629f75c from master

1 files changed, 4 insertions, 1 deletions

diff --git a/django/core/exceptions.py b/django/core/exceptions.py
index 28e712e0a5..0e333d06e5 100644
--- a/django/core/exceptions.py
+++ b/django/core/exceptions.py
@@ -118,7 +118,10 @@ class ValidationError(Exception):
                 # Normalize plain strings to instances of ValidationError.
                 if not isinstance(message, ValidationError):
                     message = ValidationError(message)
-                self.error_list.extend(message.error_list)
+                if hasattr(message, 'error_dict'):
+                    self.error_list.extend(sum(message.error_dict.values(), []))
+                else:
+                    self.error_list.extend(message.error_list)
 
         else:
             self.message = message