Clear Parent Reference to Begin State When it is Erased (#3769)

* clear any parent reference to the state being erased even when it is the begin state

* Apply suggestions from code review

Co-authored-by: Jacob Keeler <jacob.keeler@livioradio.com>

Co-authored-by: Jacob Keeler <jacob.keeler@livioradio.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/components/application_manager/src/application_state.cc b/src/components/application_manager/src/application_state.cc
index adaefd2e95..ee43d32b0a 100644
--- a/src/components/application_manager/src/application_state.cc
+++ b/src/components/application_manager/src/application_state.cc
@@ -205,7 +205,12 @@ void ApplicationState::RemoveHMIState(const WindowID window_id,
 void ApplicationState::EraseHMIState(HmiStates& hmi_states,
                                      HmiStates::iterator it) {
   if (hmi_states.begin() == it) {
-    (*it)->set_parent(nullptr);
+    HmiStates::iterator next = it;
+    ++next;
+    if (hmi_states.end() != next) {
+      HmiStatePtr next_state = *next;
+      next_state->set_parent(nullptr);
+    }
   } else {
     HmiStates::iterator next = it;
     HmiStates::iterator prev = it;