添加UFUNCTION/UPROPERTY导致Unreal 5.3构建失败求助

我们基于Unreal Engine 5.3开发C++/蓝图项目已近一年，近期突然出现异常：只要添加新的UFUNCTION或UPROPERTY声明，构建就会出现数百个随机错误；但只要注释掉这些声明，构建和编辑器就能正常运行。

示例代码 #

#pragma once
#include "CoreMinimal.h"
#include "DevHelp.generated.h"

UCLASS(BlueprintType)
class VR_BASE_API UDevHelp : public UObject {
    GENERATED_BODY()

public:
    //Build works if UFUNCTION is commented out
    UFUNCTION(BlueprintCallable, Category = "00 Test")
    float DoMath(float first, float second) {
        return first * second;
    }
};

UBT日志信息 #

UBT日志在输出超100个随机错误后，仅提示OtherCompilationError（注释UFUNCTION后所有错误都会消失），日志内容如下：

CompilationResultException: Error: OtherCompilationError
   at UnrealBuildTool.ActionGraph.ExecuteActionsAsync(BuildConfiguration BuildConfiguration, List`1 ActionsToExecute, List`1 TargetDescriptors, ILogger Logger, IActionArtifactCache actionArtifactCache) in C:\Program Files\Epic Games\UE_5.3\Engine\Source\Programs\UnrealBuildTool\System\ActionGraph.cs:line 417
   at UnrealBuildTool.BuildMode.BuildAsync(TargetMakefile[] Makefiles, List`1 TargetDescriptors, BuildConfiguration BuildConfiguration, BuildOptions Options, FileReference WriteOutdatedActionsFile, ILogger Logger) in C:\Program Files\Epic Games\UE_5.3\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 801
   at UnrealBuildTool.BuildMode.BuildAsync(List`1 TargetDescriptors, BuildConfiguration BuildConfiguration, ISourceFileWorkingSet WorkingSet, BuildOptions Options, FileReference WriteOutdatedActionsFile, ILogger Logger, Boolean bSkipPreBuildTargets) in C:\Program Files\Epic Games\UE_5.3\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 411
   at UnrealBuildTool.BuildMode.ExecuteAsync(CommandLineArguments Arguments, ILogger Logger) in C:\Program Files\Epic Games\UE_5.3\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 252
   at UnrealBuildTool.UnrealBuildTool.Main(String[] ArgumentsArray) in C:\Program Files\Epic Games\UE_5.3\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 659

问题无关因素 #

该问题不受以下因素影响：

• 类继承自UObject或UBlueprintFunctionLibrary
• 函数为实例或静态类型
• 使用新文件或旧文件
• 在USTRUCT或UCLASS中使用UPROPERTY或UFUNCTION

已尝试的无效排查手段 #

目前已尝试以下排查手段但均无效：

• 重写/恢复MyGame.target.cs和MyGame.Editor.Target.cs
• 回滚整个项目仓库
• 删除Saved、Intermediate、DerivedDataCache、Binaries及.vs文件夹
• 重新生成Visual Studio项目文件（约20-30次）
• 重新安装Unreal Engine
• 更新Visual Studio至2022 14.13.2版本
• 在另一台电脑上测试

内容的提问来源于stack exchange，提问作者Reahreic