We are currently looking for a way to reproduce this crash. If you are experiencing this crash and can provide repro steps or a test project, please create a new thread on the Answerhub’s Bug Reports section and reference this ticket.
This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below.
Error message:
Access violation - code c0000005 (first/second chance not available)
Source Context:
177
178 template< class T >
179 FORCEINLINE T* ExactCast( UObject* Src )
180 {
181 return Src && (Src->GetClass() == T::StaticClass()) ? (T*)Src : nullptr;
182 }
183
184 #if DO_CHECK
185
186 template <typename To, typename From>
187 To* CastChecked(From* Src, ECastCheckedType::Type CheckType)
188 {
189 if (Src)
190 {
191 ***** To* Result = Cast<To>(Src);
192 if (!Result)
193 {
194 CastLogError(*Cast<UObject>(Src)->GetFullName(), *GetTypeName<To>());
195 }
196
197 return Result;
198 }
199
200 if (CheckType == ECastCheckedType::NullChecked)
201 {
202 CastLogError(TEXT("nullptr"), *GetTypeName<To>());
203 }
204
205 return nullptr;
206 }
Most recent user affected CL: 3095848
Logs:
[Link Removed]
[Link Removed]
[Link Removed]
CrashReporter User Descriptions:
Repro steps unknown
UE4Editor_MaterialEditor!CastChecked<UMaterialGraphNode,UEdGraphNode>() [casts.h:192] UE4Editor_MaterialEditor!FMatExpressionPreview::NotifyCompilationFinished() [materialeditor.cpp:168] UE4Editor_Engine!FShaderCompilingManager::ProcessCompiledShaderMaps() [shadercompiler.cpp:1652] UE4Editor_Engine!FShaderCompilingManager::ProcessAsyncResults() [shadercompiler.cpp:2078] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:2784] UE4Editor!GuardedMain() [launch.cpp:148] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:126] UE4Editor!WinMain() [launchwindows.cpp:200] UE4Editor!__scrt_common_main_seh() [exe_common.inl:264] kernel32!BaseThreadInitThunk() ntdll!RtlUserThreadStart()
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-35362 in the post.