Trying to import the Polly sample model for gltf 2.0 crashes Editor. User know that the Plugin is experimental but as the Polly Model is used for Blender gltf development, it should work. The crash happens if you also import it with Datasmith;s
This was reported and tested 4.22.3 (CL-7053642). This was reproduced in 4.23 (CL-8143293) and Main 4.24 (CL-8371218)
Results: Editor Crashes
Expected: The asset imports successfully
[2019.08.29-18.31.31:408][726]LogWindows: Error: === Critical error: === [2019.08.29-18.31.31:408][726]LogWindows: Error: [2019.08.29-18.31.31:408][726]LogWindows: Error: Assertion failed: Asset->Nodes[JointIndex].Type == FNode::EType::None || Asset->Nodes[JointIndex].Type == FNode::EType::Transform [File:D:\Build\++UE4\Sync\Engine\Plugins\Editor\GLTFImporter\Source\GLTFImporter\Private\GLTF\GLTFReader.cpp] [Line: 883] [2019.08.29-18.31.31:408][726]LogWindows: Error: [2019.08.29-18.31.31:408][726]LogWindows: Error: [2019.08.29-18.31.31:408][726]LogWindows: Error: [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffcb6c46278 KERNELBASE.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc62011f37 UE4Editor-Core.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc620146e7 UE4Editor-Core.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc61e27d1a UE4Editor-Core.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc61dafe33 UE4Editor-Core.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc61db04d0 UE4Editor-Core.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4b0c7f23 UE4Editor-GLTFImporter.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4b0b8eb2 UE4Editor-GLTFImporter.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4b0bdb01 UE4Editor-GLTFImporter.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4b0bbb98 UE4Editor-GLTFImporter.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4b0af49c UE4Editor-GLTFImporter.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc5bd4cb66 UE4Editor-UnrealEd.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4dd0fc99 UE4Editor-AssetTools.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4dd0d271 UE4Editor-AssetTools.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4dd109d4 UE4Editor-AssetTools.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4cc5cfd4 UE4Editor-ContentBrowser.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4cc552aa UE4Editor-ContentBrowser.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc4cc27354 UE4Editor-ContentBrowser.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc61282a12 UE4Editor-Slate.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc610d4021 UE4Editor-Slate.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc61150301 UE4Editor-Slate.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc6113aaca UE4Editor-Slate.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc61130414 UE4Editor-Slate.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc8ef9b8e0 UE4Editor-ApplicationCore.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc8ef8ef9f UE4Editor-ApplicationCore.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc8ef9d77f UE4Editor-ApplicationCore.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc8ef8c090 UE4Editor-ApplicationCore.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffcb868b85d USER32.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffcb868b1ef USER32.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffc8ef9e946 UE4Editor-ApplicationCore.dll!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ff7af955d3e UE4Editor.exe!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ff7af96554c UE4Editor.exe!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ff7af9655ca UE4Editor.exe!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ff7af97316c UE4Editor.exe!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ff7af975b8e UE4Editor.exe!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffcb82437e4 KERNEL32.DLL!UnknownFunction [] [2019.08.29-18.31.31:408][726]LogWindows: Error: [Callstack] 0x00007ffcba86cb81 ntdll.dll!UnknownFunction []
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-79594 in the post.