My project is using Web Browser Widget plugin. When I upgrade my project from 5.4 to 5.6, I found that the packaged app always crashed on MacOS. Then I create a new empty project and found that even the packaged app will always crash with Web Browser Plugin enabled.
My Mac’s chip is M4 Pro. Here is the message I received:
Thread 4 Crashed:0 Chromium Embedded Framework 0x42feaf488 _$LT$font_types..tag..Tag$u20$as$u20$core..cmp..PartialEq$LT$$u5b$u8$u3b$$u20$4$u5d$$GT$$GT$::eq::h5661f81bf12469f3 + 262622041 Chromium Embedded Framework 0x42feae450 _$LT$font_types..tag..Tag$u20$as$u20$core..cmp..PartialEq$LT$$u5b$u8$u3b$$u20$4$u5d$$GT$$GT$::eq::h5661f81bf12469f3 + 262580522 Chromium Embedded Framework 0x42feae4e8 _$LT$font_types..tag..Tag$u20$as$u20$core..cmp..PartialEq$LT$$u5b$u8$u3b$$u20$4$u5d$$GT$$GT$::eq::h5661f81bf12469f3 + 262582043 Chromium Embedded Framework 0x42c08bf5c blink$cxxbridge1$crash_in_rust_with_overflow + 2014164 Chromium Embedded Framework 0x42c08b0e8 blink$cxxbridge1$crash_in_rust_with_overflow + 1977165 Chromium Embedded Framework 0x42c08aa44 blink$cxxbridge1$crash_in_rust_with_overflow + 1960166 Chromium Embedded Framework 0x42c000354 cef_initialize + 4007 UnrealEditor-WebBrowser.dylib 0x411d2bfa4 CefInitialize(CefMainArgs const&, CefStructBase<CefSettingsTraits> const&, scoped_refptr<CefApp>, void*) + 1848 UnrealEditor-WebBrowser.dylib 0x411d6bd68 FWebBrowserSingleton::FWebBrowserSingleton(FWebBrowserInitSettings const&) + 51049 UnrealEditor-WebBrowser.dylib 0x411d6a79c FWebBrowserModule::GetSingleton() + 8410 UnrealEditor-WebBrowserWidget.dylib 0x402f4e994 FWebBrowserWidgetModule::StartupModule() + 30411 UnrealEditor-Core.dylib 0x10684fc4c FModuleManager::LoadModuleWithFailureReason(FName, EModuleLoadResult&, ELoadModuleFlags) + 614812 UnrealEditor-Projects.dylib 0x10338581c FModuleDescriptor::LoadModulesForPhase(ELoadingPhase::Type, TArray<FModuleDescriptor, TSizedDefaultAllocator<32>> const&, TMap<FName, EModuleLoadResult, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<FName, EModuleLoadResult, false>>&) + 33213 UnrealEditor-Projects.dylib 0x1033a4cd8 FPluginManager::TryLoadModulesForPlugin(FPlugin const&, ELoadingPhase::Type) const + 9614 UnrealEditor-Projects.dylib 0x1033a789c FPluginManager::LoadModulesForEnabledPlugins(ELoadingPhase::Type) + 193215 UnrealEditor 0x102c718f0 FEngineLoop::LoadStartupModules() + 22816 UnrealEditor 0x102c6ceb0 FEngineLoop::PreInitPostStartupScreen(char16_t const*) + 676817 UnrealEditor 0x102c5c3a0 GuardedMain(char16_t const*) + 32818 UnrealEditor 0x102c76400 -[UEAppDelegate runGameThread:] + 17619 UnrealEditor-Core.dylib 0x106643b4c -[FCocoaGameThread main] + 19220 Foundation 0x184404ba8 __NSThread__start__ + 73221 libsystem_pthread.dylib 0x182d52c0c _pthread_start + 13622 libsystem_pthread.dylib 0x182d4db80 thread_start + 8
It seems like something went wrong with the CEF, and I found that the CEF version has upgraded to 128 compared to 90 in 5.4.