Log showing the issue is caused by a reimport:
https://udn.unrealengine.com/questions/331317/recurring-editor-crash.html
This Jira was created from CrashReports submitted by the public due to the high number of occurrences.
Error message:
Assertion failed: Reference != 0 [Link Removed] [Line: 73]
Source Context:
59 Reset(InReference);
60 return *this;
61 }
62
63 // Dereferencing operators.
64 ReferencedType& operator*() const
65 {
66 check(Reference != 0);
67 return *Reference;
68 }
69
70 ReferencedType* operator->() const
71 {
72 check(Reference != 0);
73 ***** return Reference;
74 }
75
76 ReferencedType* GetOwnedPointer() const
77 {
78 return Reference;
79 }
80
81 /** Returns true if the pointer is valid */
82 bool IsValid() const
83 {
84 return ( Reference != 0 );
85 }
86
87 // implicit conversion to the reference type.
88 operator ReferencedType*() const
Most recent user affected CL: 2992821
Logs:
[Link Removed]
[Link Removed]
[Link Removed]
Repro steps unknown
UE4Editor_Engine!TScopedPointer<FStaticMeshRenderData>::operator->() [scopedpointer.h:74] UE4Editor_Engine!FDistanceFieldAsyncQueue::Build() [distancefieldatlas.cpp:489] UE4Editor_Engine!FBuildDistanceFieldThreadRunnable::Run() [distancefieldatlas.cpp:382] UE4Editor_Core!FRunnableThreadWin::Run() [windowsrunnablethread.cpp:74]
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-31685 in the post.