UE4.24 master branch automation test failure 'System.Core.HAL.Thread' (Class Name: 'FThreadTest')

Hi,

I built the UE4 current master branch, as of today, commit id: 6a8598baf2a442e3a2e24203fd0221cee1fd9710, and ran the automation tests using:


Automation RunAll

The test case fails with the entire UE4Editor hanging and becoming totally unresponsive at this point, requiring me to kill the process each time:



[2019.09.08-11.57.47:110][799]LogAutomationController: Display: Running Automation: 'System.Core.HAL.PlatformAtomics' (Class Name: 'FPlatformAtomicsTest')
[2019.09.08-11.57.47:136][801]LogAutomationController: Display: Automation Test Succeeded (PlatformAtomics - System.Core.HAL.PlatformAtomics)
[2019.09.08-11.57.47:136][801]LogAutomationController: BeginEvents: System.Core.HAL.PlatformAtomics
[2019.09.08-11.57.47:136][801]LogAutomationController: EndEvents: System.Core.HAL.PlatformAtomics
[2019.09.08-11.57.47:144][801]LogAutomationController: Display: Running Automation: 'System.Core.HAL.Thread' (Class Name: 'FThreadTest')