1 files changed, 5 insertions, 1 deletions

diff --git a/src/mailman/rest/users.py b/src/mailman/rest/users.py
index 6856798d2..018c8441d 100644
--- a/src/mailman/rest/users.py
+++ b/src/mailman/rest/users.py
@@ -192,7 +192,11 @@ class AUser(_UserBase):
         for member in self._user.memberships.members:
             member.unsubscribe()
         user_manager = getUtility(IUserManager)
-        for address in self._user.addresses:
+        # SQLAlchemy is susceptable to delete-elements-while-iterating bugs so
+        # first figure out all the addresses we want to delete, then in a
+        # separate pass, delete those addresses.  (See LP: #1419519)
+        delete = list(self._user.addresses)
+        for address in delete:
             user_manager.delete_address(address)
         user_manager.delete_user(self._user)
         no_content(response)