Fix copying the dest attributes when using a tmp file

lib/ansible/module_utils/basic.py

@@ -1663,6 +1663,8 @@ class AnsibleModule(object):
                                 if keep_dest_attrs:
                                     if dest_stat and (tmp_stat.st_uid != dest_stat.st_uid or tmp_stat.st_gid != dest_stat.st_gid):
                                         os.chown(b_tmp_dest_name, dest_stat.st_uid, dest_stat.st_gid)
+                                    if dest_stat:
+                                        shutil.copystat(b_dest, b_tmp_dest_name)
                                     os.utime(b_tmp_dest_name, times=(time.time(), time.time()))
                             except OSError as e:
                                 if e.errno != errno.EPERM:

test/integration/targets/copy/tasks/acls.yml

@@ -29,6 +29,21 @@
         - "'group::r--' in acls.stdout_lines"
         - "'other::r--' in acls.stdout_lines"
 
+  - name: Update the mode
+    command: chmod 664 /home/{{ remote_unprivileged_user }}/test.txt
+    become: yes
+
+  - name: Test updating the content preserves the mode
+    copy:
+      content: "UPDATE"
+      dest: "~/test.txt"
+    register: copy_update
+    become: yes
+    become_user: "{{ remote_unprivileged_user }}"
+
+  - assert:
+      that: copy_update.mode == "0664"
+
   always:
     - name: Clean up
       file: