When I launch an empty UE5 project using the IDE, there’s a certain chance that a bug occurs, causing the program to hang at this piece of code:
The program seems to get stuck specifically at the line
DispatchMessage(&Msg);. What are some strategies to resolve this issue?
Here’s a detailed description of the problem:
Upon launching an empty project created with Unreal Engine 5 through the Integrated Development Environment (IDE), there appears to be a sporadic bug that results in the application becoming unresponsive or ‘hanging’. The point of hanging can be traced back to the implementation of the WinPumpMessages function, which is responsible for processing messages in the message queue of the Windows operating system.
The problematic line is DispatchMessage(&Msg);, which dispatches the current message from the message queue to the window procedure associated with the window specified in the message. Typically, this operation should proceed smoothly, allowing the message pump to continue iterating over the queue. However, under certain circumstances, the execution gets stuck at this line, causing the application to become non-responsive.
This issue does not occur consistently; instead, it manifests intermittently, making it challenging to reproduce and debug systematically. The behavior suggests that there might be underlying issues related to message handling, thread synchronization, resource contention, or other runtime conditions that affect the normal flow of the message loop.
Given the nature of the problem, I am seeking advice on how to approach debugging this issue effectively, as well as potential strategies to mitigate or resolve it. Any insights into common causes and recommended debugging techniques would be greatly appreciated.