Description

Using bFasterWithoutUnity and MinFilesUsingPrecompiledHeaderOverride, on ShooterGame.Build.Cs results in Engine crash.

Steps to Reproduce

1) Create a C++ ShooterGame project in 4.21.

2) Navigate to your Visual Studio Solution's ShooterGame.Build.CS File, and Add the following to the constructor underneath PrivatePCHHeaderFile = "Public/ShooterGame.h";

bFasterWithoutUnity = true;
MinFilesUsingPrecompiledHeaderOverride = 1;

3) Modify ShooterWeapon.h by adding at the end of the class
public:
FORCEINLINE static bool Test()

{ return false; }

4) Modify ShooterPickup_Ammo.cpp by adding inside the constructor
check(AShooterWeapon::Test());

5) Press F5 in VS to start debugging, which will build everything. When the engine loads, it will fail on the check() as expected

6) Modify JUST ShooterWeapon.h so that now Test returns true
public: FORCEINLINE static bool Test()

{ return true; }

7) Press F5. To build

Result: Crash: Please see Call Stack

Expected: Files that use a header being rebuilt when such header is modified.

Callstack

Assertion failed: AShooterWeapon::Test() [Link Removed] [Line: 10]

UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:417]
UE4Editor_ShooterGame_5667!AShooterPickup_Ammo::AShooterPickup_Ammo() [e:\projects\shootergame\source\shootergame\private\pickups\shooterpickup_ammo.cpp:10]
UE4Editor_HotReload!FHotReloadClassReinstancer::RecreateCDOAndSetupOldClassReinstancing() [d:\build\++ue4\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:247]
UE4Editor_HotReload!FHotReloadClassReinstancer::FHotReloadClassReinstancer() [d:\build\++ue4\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:322]
UE4Editor_HotReload!FHotReloadClassReinstancer::Create() [d:\build\++ue4\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.h:120]
UE4Editor_HotReload!FHotReloadModule::ReinstanceClass() [d:\build\++ue4\sync\engine\source\developer\hotreload\private\hotreload.cpp:1255]
UE4Editor_HotReload!FHotReloadModule::ReinstanceClasses() [d:\build\++ue4\sync\engine\source\developer\hotreload\private\hotreload.cpp:1242]
UE4Editor_HotReload!TBaseRawMethodDelegateInstance<0,FHotReloadModule,void __cdecl(void)>::ExecuteIfSafe() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:518]
UE4Editor_CoreUObject!UClassReplaceHotReloadClasses() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:746]
UE4Editor_CoreUObject!ProcessNewlyLoadedUObjects() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:872]
UE4Editor_CoreUObject!TBaseStaticDelegateInstance<void __cdecl(void)>::ExecuteIfSafe() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:813]
UE4Editor_Core!TBaseMulticastDelegate<void>::Broadcast() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:974]
UE4Editor_Core!FModuleManager::LoadModuleWithFailureReason() [d:\build\++ue4\sync\engine\source\runtime\core\private\modules\modulemanager.cpp:510]
UE4Editor_Core!FModuleManager::LoadModule() [d:\build\++ue4\sync\engine\source\runtime\core\private\modules\modulemanager.cpp:356]
UE4Editor_HotReload!FHotReloadModule::DoHotReloadInternal() [d:\build\++ue4\sync\engine\source\developer\hotreload\private\hotreload.cpp:784]
UE4Editor_HotReload!FHotReloadModule::DoHotReloadFromIDE() [d:\build\++ue4\sync\engine\source\developer\hotreload\private\hotreload.cpp:1515]
UE4Editor_HotReload!FHotReloadModule::Tick() [d:\build\++ue4\sync\engine\source\developer\hotreload\private\hotreload.cpp:1459]
UE4Editor_Core!FTicker::Tick() [d:\build\++ue4\sync\engine\source\runtime\core\private\containers\ticker.cpp:95]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3894]
UE4Editor!GuardedMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launch.cpp:174]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:145]
UE4Editor!WinMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:276]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283]
kernel32

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Backlogged
ComponentCore
Affects Versions4.204.21
CreatedJan 11, 2019
UpdatedMay 16, 2019