include_role: expose vars from parent roles to role's handlers (#81524) (#81548)

Fixes #80459

(cherry picked from commit 98f1627817)

changelogs/fragments/80459-handlers-nested-includes-vars.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - include_role - expose variables from parent roles to role's handlers (https://github.com/ansible/ansible/issues/80459)

lib/ansible/playbook/role_include.py

@@ -113,7 +113,7 @@ class IncludeRole(TaskInclude):
             b.collections = actual_role.collections
 
         # updated available handlers in play
-        handlers = actual_role.get_handler_blocks(play=myplay)
+        handlers = actual_role.get_handler_blocks(play=myplay, dep_chain=dep_chain)
         for h in handlers:
             h._parent = p_block
         myplay.handlers = myplay.handlers + handlers

test/integration/targets/handlers/roles/r1-dep_chain-vars/defaults/main.yml

@@ -0,0 +1 @@
+v: foo

test/integration/targets/handlers/roles/r1-dep_chain-vars/tasks/main.yml

@@ -0,0 +1,2 @@
+- include_role:
+    name: r2-dep_chain-vars

test/integration/targets/handlers/roles/r2-dep_chain-vars/handlers/main.yml

@@ -0,0 +1,4 @@
+- name: h
+  assert:
+    that:
+      - v is defined

test/integration/targets/handlers/roles/r2-dep_chain-vars/tasks/main.yml

@@ -0,0 +1,2 @@
+- command: echo
+  notify: h

test/integration/targets/handlers/runme.sh

@@ -190,3 +190,5 @@ ansible-playbook test_include_role_handler_once.yml -i inventory.handlers "$@" 2
 
 ansible-playbook test_listen_role_dedup.yml "$@" 2>&1 | tee out.txt
 [ "$(grep out.txt -ce 'a handler from a role')" = "1" ]
+
+ansible localhost -m include_role -a "name=r1-dep_chain-vars" "$@"