Failed running IL2CPP on Android with "error: expected expression" (Unity 2018.1.6)

Hello,

I'm trying to build my Unity project for Android with IL2CPP. I've had some strange errors with Unity 2018.2 beta that I wasn't quite sure what to do about. Building with Unity 2018.1.6f1 also fails, but gives a different error.

It seems to be a syntax error in one of the generated .cpp files, not sure what could be causing this though. Does anyone have any idea what might be the culprit?

 Failed running C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\il2cpp/build/il2cpp.exe --convert-to-cpp --emit-null-checks --enable-array-bounds-check --dotnetprofile="unityjit" --compile-cpp --libil2cpp-static --platform="Android" --architecture="ARMv7" --configuration="Release" --outputpath="D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Temp\StagingArea\assets\bin\Data\Native\armeabi-v7a\libil2cpp.so" --cachedirectory="D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Assets\..\Library\il2cpp_android_armeabi-v7a/il2cpp_cache" --additional-include-directories="C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\bdwgc/include" --additional-include-directories="C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\libil2cpp/include" --tool-chain-path="C:/android-ndk-r13b" --map-file-parser="C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\Tools\MapFileParser\MapFileParser.exe" <SHORTENED>
 
 stdout:
 Building libil2cpp.so with AndroidToolChain.
     Output directory: D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Temp\StagingArea\assets\bin\Data\Native\armeabi-v7a
     Cache directory: D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Library\il2cpp_android_armeabi-v7a\il2cpp_cache
 il2cpp.exe didn't catch exception: Unity.IL2CPP.Building.BuilderFailedException: D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Temp\StagingArea\Il2Cpp\il2cppOutput\Il2CppComCallableWrappers0.cpp:5095:22: error: expected expression
                         *comReturnValue = {};
                                           ^
 1 error generated.
 
 
 Invocation was: Executable: "C:\android-ndk-r13b\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++"
 Arguments: -DNET_4_0 -DUNITY_JIT -DGC_NOT_DLL -DRUNTIME_IL2CPP -DLINUX -DANDROID -DPLATFORM_ANDROID -D__linux__ -D__STDC_FORMAT_MACROS -I"C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\bdwgc\include" -I"C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\libil2cpp\include" -I"C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\il2cpp\libil2cpp" -I"C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\il2cpp\external\boehmgc\include" -I"C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\il2cpp\libil2cpp\mono-runtime" -I"D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Temp\StagingArea\Il2Cpp\il2cppOutput" -I"." -I"C:\android-ndk-r13b\sources\cxx-stl\gnu-libstdc++\4.9\include" -I"C:\android-ndk-r13b\sources\cxx-stl\gnu-libstdc++\4.9\include\backward" -I"C:\android-ndk-r13b\sources\cxx-stl\gnu-libstdc++\4.9\libs\armeabi-v7a\include" -c -g -DNDEBUG -funwind-tables -fno-limit-debug-info -fPIC -fdata-sections -ffunction-sections -Wa,--noexecstack -fno-rtti -std=c++98 -fno-strict-aliasing -fvisibility=hidden -fvisibility-inlines-hidden -fno-strict-overflow -fPIE -Os --sysroot "C:\android-ndk-r13b\platforms\android-16\arch-arm" -gcc-toolchain "C:\android-ndk-r13b\toolchains\arm-linux-androideabi-4.9\prebuilt\windows-x86_64" -target armv7-none-linux-androideabi -mfpu=neon -march=armv7-a -mfloat-abi=softfp -mfpu=vfp "D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Temp\StagingArea\Il2Cpp\il2cppOutput\Il2CppComCallableWrappers0.cpp" -o "D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Library\il2cpp_android_armeabi-v7a\il2cpp_cache\30C29C26BB47510C9864638BA0ED5577.o"
 
    at Unity.IL2CPP.Building.CppProgramBuilder.BuildAllCppFiles(IEnumerable`1 sourceFilesToCompile, IBuildStatisticsCollector statisticsCollector)
    at Unity.IL2CPP.Building.CppProgramBuilder.Build(IBuildStatistics& statistics)
    at Unity.IL2CPP.Building.Statistics.BuildingTestRunnerHelper.BuildAndLogStatsForTestRunner(CppProgramBuilder builder, IBuildStatistics& statistics)
    at il2cpp.Program.DoRun(String[] args)
    at il2cpp.Program.Run(String[] args)
    at il2cpp.Program.Main(String[] args)
 stderr:
 
 Unhandled Exception: Unity.IL2CPP.Building.BuilderFailedException: D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Temp\StagingArea\Il2Cpp\il2cppOutput\Il2CppComCallableWrappers0.cpp:5095:22: error: expected expression
                         *comReturnValue = {};
                                           ^
 1 error generated.
 
 
 Invocation was: Executable: "C:\android-ndk-r13b\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++"
 Arguments: -DNET_4_0 -DUNITY_JIT -DGC_NOT_DLL -DRUNTIME_IL2CPP -DLINUX -DANDROID -DPLATFORM_ANDROID -D__linux__ -D__STDC_FORMAT_MACROS -I"C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\bdwgc\include" -I"C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\libil2cpp\include" -I"C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\il2cpp\libil2cpp" -I"C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\il2cpp\external\boehmgc\include" -I"C:\Program Files\Unity\Hub\Editor\2018.1.6f1\Editor\Data\il2cpp\libil2cpp\mono-runtime" -I"D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Temp\StagingArea\Il2Cpp\il2cppOutput" -I"." -I"C:\android-ndk-r13b\sources\cxx-stl\gnu-libstdc++\4.9\include" -I"C:\android-ndk-r13b\sources\cxx-stl\gnu-libstdc++\4.9\include\backward" -I"C:\android-ndk-r13b\sources\cxx-stl\gnu-libstdc++\4.9\libs\armeabi-v7a\include" -c -g -DNDEBUG -funwind-tables -fno-limit-debug-info -fPIC -fdata-sections -ffunction-sections -Wa,--noexecstack -fno-rtti -std=c++98 -fno-strict-aliasing -fvisibility=hidden -fvisibility-inlines-hidden -fno-strict-overflow -fPIE -Os --sysroot "C:\android-ndk-r13b\platforms\android-16\arch-arm" -gcc-toolchain "C:\android-ndk-r13b\toolchains\arm-linux-androideabi-4.9\prebuilt\windows-x86_64" -target armv7-none-linux-androideabi -mfpu=neon -march=armv7-a -mfloat-abi=softfp -mfpu=vfp "D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Temp\StagingArea\Il2Cpp\il2cppOutput\Il2CppComCallableWrappers0.cpp" -o "D:\Sync\Projects\Software\Applications\NeoS\Neos Unity Runtime\Library\il2cpp_android_armeabi-v7a\il2cpp_cache\30C29C26BB47510C9864638BA0ED5577.o"
 
    at Unity.IL2CPP.Building.CppProgramBuilder.BuildAllCppFiles(IEnumerable`1 sourceFilesToCompile, IBuildStatisticsCollector statisticsCollector)
    at Unity.IL2CPP.Building.CppProgramBuilder.Build(IBuildStatistics& statistics)
    at Unity.IL2CPP.Building.Statistics.BuildingTestRunnerHelper.BuildAndLogStatsForTestRunner(CppProgramBuilder builder, IBuildStatistics& statistics)
    at il2cpp.Program.DoRun(String[] args)
    at il2cpp.Program.Run(String[] args)
    at il2cpp.Program.Main(String[] args)