[FIX] base: browse(record) in company-dependent field value

The faulty code modifies a dictionary in-place to apply a formatting
function to each value.  In this case, the formatting is `browse`, and
the issue occurs when `ids` contain duplicates:

    for id in ids:
        result[id] = format(result.get(id, default))

Fix it by returning a new dictionary based on `result`.

X-original-commit: bd4565e227c7196604af9c5c51ce136a2beac088

odoo/addons/base/models/ir_property.py

@@ -302,11 +302,12 @@ class Property(models.Model):
             cr.execute(query, params + [sub_refs])
             result.update(cr.fetchall())
 
-        # remove default value, add missing values, and format them
-        default = result.pop(None, None)
-        for id in ids:
-            result[id] = clean(result.get(id, default))
-        return result
+        # determine all values and format them
+        default = result.get(None, None)
+        return {
+            id: clean(result.get(id, default))
+            for id in ids
+        }
 
     @api.model
     def set_multi(self, name, model, values, default_value=None):

odoo/addons/test_new_api/tests/test_new_fields.py

@@ -998,6 +998,12 @@ class TestFields(TransactionCaseWithUserDemo):
         self.assertEqual(record.with_user(user1).tag_id, tag2)
         self.assertEqual(record.with_user(user2).tag_id, tag0)
 
+        # regression: duplicated records caused values to be browse(browse(id))
+        recs = record.create({}) + record + record
+        recs.invalidate_cache()
+        for rec in recs.with_user(user0):
+            self.assertIsInstance(rec.tag_id.id, int)
+
         # unlink value of a many2one (tag2), and check again
         tag2.unlink()
         self.assertEqual(record.with_user(user0).tag_id, tag1)