Android build crash in MediaPipePremium license parsing — UE 5.6 and 5.7

[bumsuec]

Hi,

I'm encountering a reproducible Android startup crash in MediaPipe4U Premium. I reproduced the same issue with both UE 5.6 and UE 5.7.

The project packages and installs successfully. On launch, MediaPipePremium finds the license file correctly:

LogMediaPipePremium: Android assert cached:
/storage/emulated/0/Android/data/com.YourCompany.churi_main/files/mediapipe4u/mediapipe4u.license

LogMediaPipePremium: Check license:
/storage/emulated/0/Android/data/com.YourCompany.churi_main/files/mediapipe4u/mediapipe4u.license

Immediately afterward, Unreal crashes:

Fatal error: [MallocBinnedCommon.cpp] [Line: 635]
FMallocBinnedCommon attempted to GetAllocationSizeExternal
on an unrecognized pointer

I symbolicated the UE 5.7 Android crash using the packaged symbols. The relevant stack is:

FMallocBinnedCommonBase::UnrecognizedPointerFatalError(void*)
TMallocBinnedCommon<FMallocBinned3,...>::GetAllocationSizeExternal(...)
FMallocPoisonProxy::Free(void*)

std::__ndk1::basic_string<...>::__is_long() const
string:1773

FLicenseInfo::ParseFromFile(FString const&)
MediaPipePremium/Private/License/LicenseInfo.cpp:145

FMediaPipePremiumModule::LoadLicense()
MediaPipePremium/Private/MediaPipePremium.cpp:126

FModuleManager::LoadModuleWithFailureReason(...)
FModuleManager::GetOrLoadModule(...)
FModuleManager::LoadModuleChecked(...)

UMediaPipePluginSettings::RefreshLicenseInfo()
MediaPipePluginSettings.cpp:26

UMediaPipePluginSettings::UMediaPipePluginSettings()
MediaPipePluginSettings.cpp:15

Environment:

Unreal Engine: 5.7
Android NDK: 27.2.12479018 (r27c)
Architecture: arm64-v8a
Device OS: Android 13
MediaPipe4U: current UE 5.7 package

The debug symbols for the supplied Premium binary also show it was built against NDK 27.2.12479018.

I also verified that the license copied to the device is byte-for-byte identical to the source license (same SHA-256), so this does not appear to be a corrupted/missing license file.

The Premium package only provides Public/License/LicenseInfo.h; Private/License/LicenseInfo.cpp is not included, so I cannot inspect or patch line 145 locally.

Could you please check FLicenseInfo::ParseFromFile() around LicenseInfo.cpp:145, particularly the std::string lifetime/deallocation there? The stack appears to show a std::string operation reaching FMallocPoisonProxy::Free() with a pointer Unreal does not recognize.

I can provide the full logcat and additional symbolicated addresses if needed.

Thank you.

[endink]

To stay focused, I turned this discussion into an issue : #271