Fixed regression caused by #19102

django/db/models/sql/query.py

@@ -115,7 +115,6 @@ class Query(object):
         self.default_ordering = True
         self.standard_ordering = True
         self.ordering_aliases = []
-        self.select_fields = []
         self.related_select_fields = []
         self.dupe_avoidance = {}
         self.used_aliases = set()
@@ -124,6 +123,9 @@ class Query(object):
 
         # SQL-related attributes
         self.select = []
+        # For each to-be-selected field in self.select there must be a
+        # corresponding entry in self.select - git seems to need this.
+        self.select_fields = []
         self.tables = []    # Aliases in the order they are created.
         self.where = where()
         self.where_class = where

django/db/models/sql/subqueries.py

@@ -76,7 +76,7 @@ class DeleteQuery(Query):
                 return
             else:
                 innerq.clear_select_clause()
-                innerq.select = [(self.get_initial_alias(), pk.column)]
+                innerq.select, innerq.select_fields = [(self.get_initial_alias(), pk.column)], [None]
                 values = innerq
             where = self.where_class()
             where.add((Constraint(None, pk.column, pk), 'in', values), AND)
@@ -244,7 +244,7 @@ class DateQuery(Query):
         alias = result[3][-1]
         select = Date((alias, field.column), lookup_type)
         self.clear_select_clause()
-        self.select = [select]
+        self.select, self.select_fields = [select], [None]
         self.distinct = True
         self.order_by = order == 'ASC' and [1] or [-1]