Unreal Engine editor 5.5.x Crashes when Perforce select for Revision Control

Development Platform & Builds
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1

After selecting Perforce in Revision Control, a crash occurs due to a Segmentation fault. It blames the clang update that was made in UE 5.5 since the Perforce plugin was not updated along with clang. I would be glad if this is fixed or a manual fix is ​​suggested, it is very inconvenient to work now when there is no integration with Perforce
OS: Linux (Debian or Arch does not matter)
UE Version: 5.5.x (on version 5.4.x such a crash does not happen)
Logs:

<FGenericCrashContext>
<RuntimeProperties>
<CrashVersion>3</CrashVersion>
<ExecutionGuid>41BF7351DB6E4352AFCD58FF73E81CBC</ExecutionGuid>
<CrashGUID>UECC-Linux-B524F54022C04A25891FF83C9503DFDB_0000</CrashGUID>
<IsEnsure>false</IsEnsure>
<IsStall>false</IsStall>
<IsAssert>false</IsAssert>
<CrashType>Crash</CrashType>
<ErrorMessage>Caught signal 11 Segmentation fault</ErrorMessage>
<CrashReporterMessage></CrashReporterMessage>
<CrashReporterMessage>Attended</CrashReporterMessage>
<ProcessId>11079</ProcessId>
<SecondsSinceStart>95</SecondsSinceStart>
<IsInternalBuild>false</IsInternalBuild>
<IsPerforceBuild>false</IsPerforceBuild>
<IsWithDebugInfo>true</IsWithDebugInfo>
<IsSourceDistribution>true</IsSourceDistribution>
<GameName>UE-LyraStarterGame</GameName>
<ExecutableName>UnrealEditor</ExecutableName>
<BuildConfiguration>Development</BuildConfiguration>
<GameSessionID></GameSessionID>
<PlatformName>LinuxEditor</PlatformName>
<PlatformFullName>LinuxEditor</PlatformFullName>
<PlatformNameIni>Linux</PlatformNameIni>
<EngineMode>Editor</EngineMode>
<EngineModeEx>Dirty</EngineModeEx>
<DeploymentName></DeploymentName>
<EngineVersion>5.5.4-0+UE5</EngineVersion>
<EngineCompatibleVersion>5.5.4-0+UE5</EngineCompatibleVersion>
<CommandLine> /home/unknown/Gits/Perforce_Prjs/Shooter/LyraStarterGame/LyraStarterGame.uproject</CommandLine>
<LanguageLCID>9</LanguageLCID>
<AppDefaultLocale>en_US</AppDefaultLocale>
<BuildVersion>UE5-CL-0</BuildVersion>
<Symbols>UE5-CL-0-Linux-Development</Symbols>
<IsUERelease>false</IsUERelease>
<IsRequestingExit>false</IsRequestingExit>
<UserName></UserName>
<BaseDir>/home/unknown/Gits/UnrealEngine/Engine/Binaries/Linux/</BaseDir>
<RootDir>/home/unknown/Gits/UnrealEngine/</RootDir>
<MachineId>7E43DD74085C49CFAD61F4E957736939-000003E8</MachineId>
<LoginId>7e43dd74085c49cfad61f4e957736939-000003e8</LoginId>
<EpicAccountId></EpicAccountId>
<SourceContext></SourceContext>
<UserDescription></UserDescription>
<UserActivityHint>Layout=&quot;Document&quot; Label=&quot;Behavior Tree&quot; Content=SGraphEditor</UserActivityHint>
<CrashDumpMode>0</CrashDumpMode>
<GameStateName></GameStateName>
<Misc.NumberOfCores>4</Misc.NumberOfCores>
<Misc.NumberOfCoresIncludingHyperthreads>8</Misc.NumberOfCoresIncludingHyperthreads>
<Misc.Is64bitOperatingSystem>1</Misc.Is64bitOperatingSystem>
<Misc.CPUVendor>GenuineIntel</Misc.CPUVendor>
<Misc.CPUBrand>Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz</Misc.CPUBrand>
<Misc.PrimaryGPUBrand>NVIDIA GeForce GTX 1660 SUPER (NVIDIA UNIX x86_64 Kernel Module</Misc.PrimaryGPUBrand>
<Misc.OSVersionMajor>Manjaro Linux</Misc.OSVersionMajor>
<Misc.OSVersionMinor>6.12.20-2-MANJARO</Misc.OSVersionMinor>
<Misc.AnticheatProvider></Misc.AnticheatProvider>
<MemoryStats.TotalPhysical>33418063872</MemoryStats.TotalPhysical>
<MemoryStats.TotalVirtual>9448923136</MemoryStats.TotalVirtual>
<MemoryStats.PageSize>4096</MemoryStats.PageSize>
<MemoryStats.TotalPhysicalGB>32</MemoryStats.TotalPhysicalGB>
<MemoryStats.AvailablePhysical>11287089152</MemoryStats.AvailablePhysical>
<MemoryStats.AvailableVirtual>32696434688</MemoryStats.AvailableVirtual>
<MemoryStats.UsedPhysical>5227794432</MemoryStats.UsedPhysical>
<MemoryStats.PeakUsedPhysical>5229666304</MemoryStats.PeakUsedPhysical>
<MemoryStats.UsedVirtual>12674220032</MemoryStats.UsedVirtual>
<MemoryStats.PeakUsedVirtual>12678938624</MemoryStats.PeakUsedVirtual>
<MemoryStats.bIsOOM>0</MemoryStats.bIsOOM>
<MemoryStats.OOMAllocationSize>0</MemoryStats.OOMAllocationSize>
<MemoryStats.OOMAllocationAlignment>0</MemoryStats.OOMAllocationAlignment>
<NumMinidumpFramesToIgnore>0</NumMinidumpFramesToIgnore>
<CallStack></CallStack>
<PCallStack>

                               libc.so 0x000078ad4e00e000 + 16f05d          
 libUnrealEditor-PerforceSourceControl 0x000078acd1800000 + 1f5119          
 libUnrealEditor-PerforceSourceControl 0x000078acd1800000 + 1e193f          
 libUnrealEditor-PerforceSourceControl 0x000078acd1800000 + 1f51b5          
 libUnrealEditor-PerforceSourceControl 0x000078acd1800000 + 10acff          
 libUnrealEditor-PerforceSourceControl 0x000078acd1800000 + 105f12          
 libUnrealEditor-PerforceSourceControl 0x000078acd1800000 + 122fc4          
 libUnrealEditor-PerforceSourceControl 0x000078acd1800000 + 10cfae          
                  libUnrealEditor-Core 0x000078ad5a000000 + c39630          
                          UnrealEditor 0x0000000000200000 + 60bc7           
                          UnrealEditor 0x0000000000200000 + 60401           
                  libUnrealEditor-Core 0x000078ad5a000000 + 7c3326          
                  libUnrealEditor-Core 0x000078ad5a000000 + 7ba598          
                  libUnrealEditor-Core 0x000078ad5a000000 + 7ba9fb          
                  libUnrealEditor-Core 0x000078ad5a000000 + 77c1b7          
                  libUnrealEditor-Core 0x000078ad5a000000 + 77ce24          
                  libUnrealEditor-Core 0x000078ad5a000000 + 9d0142          
                  libUnrealEditor-Core 0x000078ad5a000000 + 985ba6          
                  libUnrealEditor-Core 0x000078ad5a000000 + 8dc46a          
                               libc.so 0x000078ad4e00e000 + 9570a           
                               libc.so 0x000078ad4e00e000 + 119aac          
</PCallStack>
<PCallStackHash>4AAEC6EEA9F2740AEDA102AB608ABE53830E0B6D</PCallStackHash>
</RuntimeProperties>
<PlatformProperties>
<CrashSignal>11</CrashSignal>
<CrashSignalName>Segmentation fault</CrashSignalName>
<PlatformCallbackResult>0</PlatformCallbackResult>
<CrashTrigger>0</CrashTrigger>
</PlatformProperties>
<EngineData>
<MatchingDPStatus>LinuxEditorNo errors</MatchingDPStatus>
<RHI.DriverDenylisted>false</RHI.DriverDenylisted>
<RHI.RHIName>Vulkan</RHI.RHIName>
<RHI.AdapterName>NVIDIA GeForce GTX 1660 SUPER</RHI.AdapterName>
<RHI.UserDriverVersion>570.133</RHI.UserDriverVersion>
<RHI.InternalDriverVersion>570.133</RHI.InternalDriverVersion>
<RHI.DriverDate>01-01-01</RHI.DriverDate>
<RHI.FeatureLevel>SM6</RHI.FeatureLevel>
<RHI.GPUVendor>NVIDIA</RHI.GPUVendor>
<RHI.DeviceId>21C4</RHI.DeviceId>
<DeviceProfile.Name>LinuxEditor</DeviceProfile.Name>
</EngineData>
<GameData>
</GameData>

[2025.04.08-14.53.03:659][222]LogSourceControl: Attempting 'p4 clients -u SomeUsername'
[2025.04.08-14.53.04:681][222]LogCore: === Critical error: ===
Unhandled Exception: SIGSEGV: invalid attempt to read memory at address 0x0000000000000000

[2025.04.08-14.53.04:681][222]LogCore: Fatal error!

0x000078ad4e17d05d libc.so.6!UnknownFunction(0x16f05d)
0x000078acd19f5119 libUnrealEditor-PerforceSourceControl.so!StrDict::SetVar(char const*, StrPtr const&) [/var/tmp/114171922/depot/r18.1/p4-bin/../p4/support/strbuf.h:338]
0x000078acd19e193f libUnrealEditor-PerforceSourceControl.so!TransDict::VSetVar(StrPtr const&, StrPtr const&) [/var/tmp/114171922/depot/r18.1/p4-bin/../p4/support/strbuf.h:106]
0x000078acd19f51b5 libUnrealEditor-PerforceSourceControl.so!StrDict::SetArgv(int, char* const*) [/var/tmp/114171922/depot/r18.1/p4-bin/../p4/support/strbuf.h:320]
0x000078acd190acff libUnrealEditor-PerforceSourceControl.so!FPerforceConnection::RunCommand(FString const&, TArray<FString, TSizedDefaultAllocator<32> > const&, TArray<FP4Record, TSizedDefaultAllocator<32> >&, TArray<FSharedBuffer, TSizedDefaultAllocator<32> >*, FSourceControlResultInfo&, TDelegate<bool (), FDefaultDelegateUserPolicy>, bool&, ERunCommandFlags) [/home/unknown/Gits/UnrealEngine/Engine/Source/./../Plugins/Developer/PerforceSourceControl/Source/PerforceSourceControl/Private/PerforceConnection.cpp:1182]
0x000078acd1905f12 libUnrealEditor-PerforceSourceControl.so!FPerforceConnection::GetWorkspaceList(FPerforceConnectionInfo const&, TDelegate<bool (), FDefaultDelegateUserPolicy>, TArray<FString, TSizedDefaultAllocator<32> >&, FSourceControlResultInfo&) [/home/unknown/Gits/UnrealEngine/Engine/Source/./../Plugins/Developer/PerforceSourceControl/Source/PerforceSourceControl/Private/PerforceConnection.h:119]
0x000078acd1922fc4 libUnrealEditor-PerforceSourceControl.so!FPerforceGetWorkspacesWorker::Execute(FPerforceSourceControlCommand&) [/home/unknown/Gits/UnrealEngine/Engine/Source/./../Plugins/Developer/PerforceSourceControl/Source/PerforceSourceControl/Private/PerforceSourceControlOperations.cpp:2205]
0x000078acd190cfae libUnrealEditor-PerforceSourceControl.so!FPerforceSourceControlCommand::DoThreadedWork() [/home/unknown/Gits/UnrealEngine/Engine/Source/./../Plugins/Developer/PerforceSourceControl/Source/PerforceSourceControl/Private/PerforceSourceControlCommand.cpp:30]
0x000078ad5ac39630 libUnrealEditor-Core.so!FQueuedThreadPoolWrapper::FScheduledWork::DoThreadedWork() [/home/unknown/Gits/UnrealEngine/Engine/Source/Runtime/Core/Public/Misc/QueuedThreadPoolWrapper.h:142]
0x0000000000260bc7 UnrealEditor!FQueuedLowLevelThreadPool::AddQueuedWork(IQueuedWork*, EQueuedWorkPriority)::'lambda'()::operator()() const [/home/unknown/Gits/UnrealEngine/Engine/Source/Runtime/Core/Public/Misc/QueuedThreadPoolWrapper.h:484]
0x0000000000260401 UnrealEditor!LowLevelTasks::TTaskDelegate<LowLevelTasks::FTask* (bool), 48u>::TTaskDelegateImpl<void LowLevelTasks::FTask::Init<FQueuedLowLevelThreadPool::AddQueuedWork(IQueuedWork*, EQueuedWorkPriority)::'lambda'()>(char16_t const*, LowLevelTasks::ETaskPriority, FQueuedLowLevelThreadPool::AddQueuedWork(IQueuedWork*, EQueuedWorkPriority)::'lambda'()&&, LowLevelTasks::ETaskFlags)::'lambda'(bool), false>::CallAndMove(LowLevelTasks::TTaskDelegate<LowLevelTasks::FTask* (bool), 48u>&, void*, unsigned int, bool) [/home/unknown/Gits/UnrealEngine/Engine/Source/Runtime/Core/Public/Async/Fundamental/Task.h:499]
0x000078ad5a7c3326 libUnrealEditor-Core.so!LowLevelTasks::FTask::ExecuteTask() [/home/unknown/Gits/UnrealEngine/Engine/Source/Runtime/Core/Public/Async/Fundamental/TaskDelegate.h:308]
0x000078ad5a7ba598 libUnrealEditor-Core.so!LowLevelTasks::FScheduler::ExecuteTask(LowLevelTasks::FTask*) [/home/unknown/Gits/UnrealEngine/Engine/Source/./Runtime/Core/Private/Async/Fundamental/Scheduler.cpp:267]
0x000078ad5a7ba9fb libUnrealEditor-Core.so!LowLevelTasks::FScheduler::TryExecuteTaskFrom<LowLevelTasks::Private::TLocalQueueRegistry<1024U, 1024U>::TLocalQueue, &LowLevelTasks::Private::TLocalQueueRegistry<>::TLocalQueue::Dequeue, false> [/home/unknown/Gits/UnrealEngine/Engine/Source/./Runtime/Core/Private/Async/Fundamental/Scheduler.cpp:457]
0x000078ad5a77c1b7 libUnrealEditor-Core.so!LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) [/home/unknown/Gits/UnrealEngine/Engine/Source/./Runtime/Core/Private/Async/Fundamental/Scheduler.cpp:513]
0x000078ad5a77ce24 libUnrealEditor-Core.so!LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) [/home/unknown/Gits/UnrealEngine/Engine/Source/./Runtime/Core/Private/Async/Fundamental/Scheduler.cpp:571]
0x000078ad5a9d0142 libUnrealEditor-Core.so!FThreadImpl::Run() [/home/unknown/Gits/UnrealEngine/Engine/Source/Runtime/Core/Public/Templates/Function.h:470]
0x000078ad5a985ba6 libUnrealEditor-Core.so!FRunnableThreadPThread::Run() [/home/unknown/Gits/UnrealEngine/Engine/Source/./Runtime/Core/Private/HAL/PThreadRunnableThread.cpp:25]
0x000078ad5a8dc46a libUnrealEditor-Core.so!FRunnableThreadPThread::_ThreadProc(void*) [/home/unknown/Gits/UnrealEngine/Engine/Source/Runtime/Core/Private/HAL/PThreadRunnableThread.h:187]
0x000078ad4e0a370a libc.so.6!UnknownFunction(0x95709)
0x000078ad4e127aac libc.so.6!UnknownFunction(0x119aab)

[2025.04.08-14.53.04:691][222]LogExit: Executing StaticShutdownAfterError
2

I had the same issue in 5.5.4.

It looks like the crash isn’t present in 5.6 anymore, at least it works on my machine(Ubuntu 24.04).

The only workaround i found for 5.5 is to manually download the new toolchain for 5.6 found here:

Specifically v25, 5.5 used v23 i guess the root of the issue lays there.

After downloading move the extracted folder to

Engine/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux_x64

You also have to update the Linux_SDK.json to match the new version found here:

Engine/Config/Linux/Linux_SDK.json

After that i installed the toolchain via RunMe.sh found here:

Engine/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux_x64/v25_clang-18.1.0-rockylinux8/build/scripts

Lastly clean the build, delete /Intermediate and rebuild the engine from scratch.

I haven’t extensively tested this workaround but perforce works, and everything else i tried also seems to work fine.

I’m not 100% sure if i’ve provided every step of the workaround, took me some time to fix this.