Ansible 2.1.1 regression for conditional include handling: https://github.com/ansible/ansible/issues/17687

00-full-command-transcript.sh

#!/bin/bash

apt-get update && \
  apt-get purge -y nano && \
  apt-get install -y git vim tmux fail2ban build-essential python2.7 python-dev libssl-dev libffi-dev

curl --silent --show-error --retry 5 https://bootstrap.pypa.io/get-pip.py | sudo python2.7

pip install ansible==2.1.0

ansible-playbook -i inventory.ini 02-playbook.yml -vv

pip install -U ansible==2.1.1

ansible-playbook -i inventory.ini 02-playbook.yml -vv

01-inventory.ini

[all]
localhost ansible_connection=local

02-playbook.yml

---
- name: Test conditional block (yes)
  hosts: localhost
  gather_facts: false
  tasks:
     - block:
         - debug:
             msg: "block -> include_me: {{ include_me }}"
         - debug:
             msg: "block -> arbitrary message"
       when: include_me | bool
  vars:
    include_me: yes

- name: Test conditional block (no)
  hosts: localhost
  gather_facts: false
  tasks:
     - block:
         - debug:
             msg: "block -> include_me: {{ include_me }}"
         - debug:
             msg: "block -> arbitrary message"
       when: include_me | bool
  vars:
    include_me: no

- name: Test conditional include (yes)
  hosts: localhost
  gather_facts: false
  tasks:
     - include: 03-included-task.yml
       when: include_me | bool
  vars:
    include_me: yes

- name: Test conditional include (no)
  hosts: localhost
  gather_facts: false
  tasks:
     - include: 03-included-task.yml
       when: include_me | bool
  vars:
    include_me: no

- name: Test both conditional block and conditional include together (yes)
  hosts: localhost
  gather_facts: false
  tasks:
     - block:
         - debug:
             msg: "block -> include_me: {{ include_me }}"
         - debug:
             msg: "block -> arbitrary message"
         - include: 03-included-task.yml
       when: include_me | bool
  vars:
    include_me: yes

- name: Test both conditional block and conditional include together (yes)
  hosts: localhost
  gather_facts: false
  tasks:
     - block:
         - debug:
             msg: "block -> include_me: {{ include_me }}"
         - debug:
             msg: "block -> arbitrary message"
         - include: 03-included-task.yml
       when: include_me | bool
  vars:
    include_me: no

03-included-task.yml

---
- debug:
    msg: "included-task -> include_me: {{ include_me }}"

- debug:
    msg: "included-task -> arbitrary message"

04-ansible-2.1.0-output.log

root@ansible1:~# ansible-playbook -i inventory.ini 02-playbook.yml -vv
No config file found; using defaults

PLAYBOOK: 02-playbook.yml ******************************************************
6 plays in 02-playbook.yml

PLAY [Test conditional block (yes)] ********************************************

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:7
ok: [localhost] => {
    "msg": "block -> include_me: True"
}

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:9
ok: [localhost] => {
    "msg": "block -> arbitrary message"
}

PLAY [Test conditional block (no)] *********************************************

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:20
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:22
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

PLAY [Test conditional include (yes)] ******************************************

TASK [include] *****************************************************************
task path: /root/02-playbook.yml:32
included: /root/03-included-task.yml for localhost

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:2
ok: [localhost] => {
    "msg": "included-task -> include_me: True"
}

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:5
ok: [localhost] => {
    "msg": "included-task -> arbitrary message"
}

PLAY [Test conditional include (no)] *******************************************

TASK [include] *****************************************************************
task path: /root/02-playbook.yml:41
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

PLAY [Test both conditional block and conditional include together (yes)] ******

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:51
ok: [localhost] => {
    "msg": "block -> include_me: True"
}

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:53
ok: [localhost] => {
    "msg": "block -> arbitrary message"
}

TASK [include] *****************************************************************
task path: /root/02-playbook.yml:55
included: /root/03-included-task.yml for localhost

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:2
ok: [localhost] => {
    "msg": "included-task -> include_me: True"
}

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:5
ok: [localhost] => {
    "msg": "included-task -> arbitrary message"
}

PLAY [Test both conditional block and conditional include together (yes)] ******

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:65
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:67
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

TASK [include] *****************************************************************
task path: /root/02-playbook.yml:69
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

PLAY RECAP *********************************************************************
localhost                  : ok=10   changed=0    unreachable=0    failed=0

05-ansible-2.1.1-output.log

root@ansible1:~# ansible-playbook -i inventory.ini 02-playbook.yml -vv
No config file found; using defaults

PLAYBOOK: 02-playbook.yml ******************************************************
6 plays in 02-playbook.yml

PLAY [Test conditional block (yes)] ********************************************

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:7
ok: [localhost] => {
    "msg": "block -> include_me: True"
}

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:9
ok: [localhost] => {
    "msg": "block -> arbitrary message"
}

PLAY [Test conditional block (no)] *********************************************

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:20
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:22
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

PLAY [Test conditional include (yes)] ******************************************

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:2
ok: [localhost] => {
    "msg": "included-task -> include_me: True"
}

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:5
ok: [localhost] => {
    "msg": "included-task -> arbitrary message"
}

PLAY [Test conditional include (no)] *******************************************

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:2
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:5
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

PLAY [Test both conditional block and conditional include together (yes)] ******

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:51
ok: [localhost] => {
    "msg": "block -> include_me: True"
}

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:53
ok: [localhost] => {
    "msg": "block -> arbitrary message"
}

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:2
ok: [localhost] => {
    "msg": "included-task -> include_me: True"
}

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:5
ok: [localhost] => {
    "msg": "included-task -> arbitrary message"
}

PLAY [Test both conditional block and conditional include together (yes)] ******

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:65
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

TASK [debug] *******************************************************************
task path: /root/02-playbook.yml:67
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:2
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

TASK [debug] *******************************************************************
task path: /root/03-included-task.yml:5
skipping: [localhost] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

PLAY RECAP *********************************************************************
localhost                  : ok=8    changed=0    unreachable=0    failed=0