Crash when opening maps and blueprints in user's project

Crash when opening maps and blueprints or PIE in user's project.

[Link Removed]

Possibly related [Link Removed]

-30763-strategy.log is the first log, which indicated that the user's custom "Civilian.uasset" was the root of the crash. (this log matches up with the crash report)
-30871-strategynew.log is the log he got after I had him remove "Civilian.uasset" from his directory and try again.

No local repro.

User opens a map, BP, or PIE's, which references a custom class "Civilian.uasset"

UE4Editor_CoreUObject! FDuplicateDataWriter::GetDuplicatedObject() + 132 bytes duplicatedatawriter.cpp:130
UE4Editor_CoreUObject! FDuplicateDataWriter::operator<<() + 24 bytes duplicatedatawriter.cpp:58
UE4Editor_CoreUObject! UObjectProperty::SerializeItem() + 55 bytes propertyobject.cpp:23
UE4Editor_CoreUObject! FPropertyTag::SerializeTaggedProperty() + 202 bytes propertytag.h:129
UE4Editor_CoreUObject! UStruct::SerializeTaggedProperties() + 10950 bytes class.cpp:1218
UE4Editor_Engine! UUserDefinedStruct::SerializeTaggedProperties() + 360 bytes userdefinedstruct.cpp:103
UE4Editor_CoreUObject! UStructProperty::SerializeItem() + 480 bytes propertystruct.cpp:125
UE4Editor_CoreUObject! FPropertyTag::SerializeTaggedProperty() + 202 bytes propertytag.h:129
UE4Editor_CoreUObject! UStruct::SerializeTaggedProperties() + 10950 bytes class.cpp:1218
UE4Editor_CoreUObject! UObject::SerializeScriptProperties() + 300 bytes obj.cpp:887
UE4Editor_CoreUObject! UObject::Serialize() + 662 bytes obj.cpp:829
UE4Editor_CoreUObject! StaticDuplicateObjectEx() + 1858 bytes uobjectglobals.cpp:1448
UE4Editor_CoreUObject! StaticDuplicateObject() + 274 bytes uobjectglobals.cpp:1362
UE4Editor_UnrealEd! FBlueprintCompileReinstancer::FBlueprintCompileReinstancer() + 722 bytes kismetreinstanceutilities.cpp:55
UE4Editor_UnrealEd! FKismetEditorUtilities::CompileBlueprint() + 599 bytes kismet2.cpp:384
UE4Editor_UnrealEd! FBlueprintEditorUtils::RegenerateBlueprintClass() + 844 bytes blueprinteditorutils.cpp:1132
UE4Editor_CoreUObject! ULinkerLoad::RegenerateBlueprintClass() + 960 bytes blueprintsupport.cpp:124
UE4Editor_CoreUObject! ULinkerLoad::RegenerateBlueprintClass() + 852 bytes blueprintsupport.cpp:114
UE4Editor_CoreUObject! ULinkerLoad::CreateExport() + 4946 bytes linkerload.cpp:3239
UE4Editor_CoreUObject! ULinkerLoad::IndexToObject() + 116 bytes linkerload.cpp:3436
UE4Editor_CoreUObject! ULinkerLoad::operator<<() + 100 bytes linkerload.cpp:3609
UE4Editor_CoreUObject! UClass::Serialize() + 1654 bytes class.cpp:3038
UE4Editor_CoreUObject! ULinkerLoad::Preload() + 2386 bytes linkerload.cpp:2769
UE4Editor_CoreUObject! ULinkerLoad::CreateExport() + 5388 bytes linkerload.cpp:3283
UE4Editor_CoreUObject! ULinkerLoad::IndexToObject() + 116 bytes linkerload.cpp:3436
UE4Editor_CoreUObject! ULinkerLoad::CreateExport() + 3415 bytes linkerload.cpp:3059
UE4Editor_CoreUObject! ULinkerLoad::CreateExportAndPreload() + 27 bytes linkerload.cpp:2441
UE4Editor_CoreUObject! ULinkerLoad::LoadAllObjects() + 571 bytes linkerload.cpp:2512
UE4Editor_CoreUObject! LoadPackageInternal() + 1957 bytes uobjectglobals.cpp:875
UE4Editor_CoreUObject! ULinkerLoad::VerifyImportInner() + 1103 bytes linkerload.cpp:2134
UE4Editor_CoreUObject! ULinkerLoad::VerifyImport() + 178 bytes linkerload.cpp:1915
UE4Editor_CoreUObject! ULinkerLoad::VerifyImportInner() + 1970 bytes linkerload.cpp:2182
UE4Editor_CoreUObject! ULinkerLoad::VerifyImport() + 178 bytes linkerload.cpp:1915
UE4Editor_CoreUObject! ULinkerLoad::CreateImport() + 1172 bytes linkerload.cpp:3386
UE4Editor_CoreUObject! ULinkerLoad::IndexToObject() + 233 bytes linkerload.cpp:3430
UE4Editor_CoreUObject! ULinkerLoad::operator<<() + 100 bytes linkerload.cpp:3609
UE4Editor_CoreUObject! UObjectProperty::SerializeItem() + 55 bytes propertyobject.cpp:23
UE4Editor_CoreUObject! FPropertyTag::SerializeTaggedProperty() + 202 bytes propertytag.h:129
UE4Editor_CoreUObject! UStruct::SerializeTaggedProperties() + 9746 bytes class.cpp:1167
UE4Editor_CoreUObject! UObject::SerializeScriptProperties() + 300 bytes obj.cpp:887
UE4Editor_CoreUObject! UObject::Serialize() + 662 bytes obj.cpp:829
UE4Editor_CoreUObject! ULinkerLoad::Preload() + 2386 bytes linkerload.cpp:2769
UE4Editor_UnrealEd! FRegenerationHelper::ForcedLoadMembers() + 200 bytes blueprinteditorutils.cpp:630
UE4Editor_UnrealEd! FRegenerationHelper::ForcedLoadMembers() + 208 bytes blueprinteditorutils.cpp:625
UE4Editor_UnrealEd! FRegenerationHelper::ForcedLoadMembers() + 208 bytes blueprinteditorutils.cpp:625
UE4Editor_UnrealEd! FBlueprintEditorUtils::RegenerateBlueprintClass() + 266 bytes blueprinteditorutils.cpp:1068
UE4Editor_CoreUObject! ULinkerLoad::RegenerateBlueprintClass() + 960 bytes blueprintsupport.cpp:124
UE4Editor_CoreUObject! ULinkerLoad::CreateExport() + 4946 bytes linkerload.cpp:3239
UE4Editor_CoreUObject! ULinkerLoad::CreateExportAndPreload() + 27 bytes linkerload.cpp:2441
UE4Editor_CoreUObject! ULinkerLoad::LoadAllObjects() + 571 bytes linkerload.cpp:2512
UE4Editor_CoreUObject! LoadPackageInternal() + 1957 bytes uobjectglobals.cpp:875
UE4Editor_CoreUObject! ULinkerLoad::VerifyImportInner() + 1103 bytes linkerload.cpp:2134
UE4Editor_CoreUObject! ULinkerLoad::VerifyImport() + 178 bytes linkerload.cpp:1915
UE4Editor_CoreUObject! ULinkerLoad::VerifyImportInner() + 1970 bytes linkerload.cpp:2182
UE4Editor_CoreUObject! ULinkerLoad::VerifyImport() + 178 bytes linkerload.cpp:1915
UE4Editor_CoreUObject! ULinkerLoad::CreateImport() + 1172 bytes linkerload.cpp:3386
UE4Editor_CoreUObject! ULinkerLoad::IndexToObject() + 233 bytes linkerload.cpp:3430
UE4Editor_CoreUObject! ULinkerLoad::operator<<() + 100 bytes linkerload.cpp:3609
UE4Editor_CoreUObject! ULinkerLoad::Preload() + 2386 bytes linkerload.cpp:2769
UE4Editor_UnrealEd! FRegenerationHelper::PreloadAndLinkIfNecessary() + 199 bytes blueprinteditorutils.cpp:662
UE4Editor_UnrealEd! FRegenerationHelper::LinkExternalDependencies() + 931 bytes blueprinteditorutils.cpp:776
UE4Editor_UnrealEd! FBlueprintEditorUtils::RegenerateBlueprintClass() + 696 bytes blueprinteditorutils.cpp:1109
UE4Editor_CoreUObject! ULinkerLoad::RegenerateBlueprintClass() + 960 bytes blueprintsupport.cpp:124
UE4Editor_CoreUObject! ULinkerLoad::CreateExport() + 4946 bytes linkerload.cpp:3239