GammaRay Crash Issue: Program Crashes When Dynamically Loading SCXML State Machines

[wenjiazhou123]

Problem Description

When dynamically loading SCXML state machines in a program, the GammaRay program crashes. I've created a simple example program to reproduce this issue, and here are the details:

Steps to Reproduce

1. Code Structure
   • Add a button to the main interface.
   • The click event of the button increases the number of items in the model.
   • Use the Repeater component to load as many newview instances as the number of items in the model.
   • In the newview, load a state machine from an SCXML file.

Here are the key parts of the example code:

main.qml

import QtQuick 2.15
import QtQuick.Window 2.15

Window {
    visible: true
    width: 640
    height: 480
    title: "Dynamic SCXML Loading Bug"

    // Define a ListModel as the data model
    ListModel {
        id: myModel
    }

    // Button to increase the number of items in the model
    Button {
        id: addButton
        text: "Add Item"
        anchors.centerIn: parent
        onClicked: {
            myModel.append({})
        }
    }

    // Repeater to load newview instances
    Repeater {
        model: myModel
        NewView {
            // Add other properties as needed
        }
    }
}

NewView.qml

import QtQuick 2.15
import QtScxml 5.15

Item {
    width: 100
    height: 100

    // Load the SCXML state machine
    ScxmlStateMachine {
        id: stateMachine
        source: "myStateMachine.scxml"
        running: true
    }
}

myStateMachine.scxml

<?xml version="1.0" encoding="UTF-8"?>
<scxml xmlns="http://www.w3.org/2005/07/scxml"
       version="1.0"
       initial="idle">
    <state id="idle">
        <transition event="start" target="active"/>
    </state>
    <state id="active">
        <transition event="stop" target="idle"/>
    </state>
</scxml>

2. Operation Steps
   • Start the program and make sure GammaRay is connected to it.
   • Click the button in the main interface to increase the number of items in the model.
   • As the Repeater loads new newview instances and dynamically loads the SCXML state machines, the program crashes.

Expected Result

When clicking the button to increase the number of items in the model, the program should run normally. The dynamically loaded SCXML state machines should work properly without causing the GammaRay program to crash.

Actual Result

Every time the button is clicked to dynamically load SCXML state machines, the GammaRay program crashes.