Reproduction steps:
1. Setup the project, choose one of two:
- Create an empty project and download this package - https://assetstore.unity.com/packages/3d/environments/urban/hq-abandoned-school-modular-106665
- Download the project attached below (OC link).
2, Make sure Editor is using Metal.
3. Open the 'DemoScene'.
- Crash.

0 libsystem_kernel.dylib 0x00007fff5776ce3e __pthread_kill + 10
1 libsystem_c.dylib 0x00007fff576c9312 abort + 127
2 Metal 0x00007fff342e343e MTLResourceListAddResource + 490
3 AMDMTLBronzeDriver 0x000000011b918dfb _Z28amdMtlBronzeCmdBufUpdateRsrcP19BronzeCmdBufInfoRecP18MTLIOAccelResourcejj + 103
4 AMDMTLBronzeDriver 0x000000011b91b89b _ZL21amdMtlBronzeSetBufferP32BronzeRenderCmdEncoderMembersRecjPU19objcproto9MTLBuffer11objc_objectyjj + 73
5 Unity 0x00000001007b221d _ZN18GfxDeviceMetalBase16DrawBufferRangesEN5metal20PipeKeyPrepareResultEP9GfxBufferiPK18VertexStreamSourceiPK16DrawBuffersRangeiP17VertexDeclarationmb + 701
6 Unity 0x00000001007b75d9 _ZThn11176_N18GfxDeviceMetalBase24DrawBufferRangesPlatformEP9GfxBufferiPK18VertexStreamSourceiPK16DrawBuffersRangeiP17VertexDeclarationmb + 313
7 Unity 0x0000000100a7a293 _ZN26SinglePassStereoSupportExt17DrawBuffersStereoEP9GfxBufferiPK18VertexStreamSourceiPK16DrawBuffersRangeiP17VertexDeclarationm + 259
8 Unity 0x00000001007b1f29 _ZN18GfxDeviceMetalBase11DrawBuffersEP9GfxBufferiPK18VertexStreamSourceiPK16DrawBuffersRangeiP17VertexDeclaration + 217
9 Unity 0x0000000102947607 _ZN15GfxDeviceWorker10RunCommandER20ThreadedStreamBuffer + 40535
10 Unity 0x00000001007bba9c GfxDeviceWorkerAutoreleasePoolProxy + 60
11 Unity 0x000000010294a6c0 _ZN15GfxDeviceWorker6RunExtER20ThreadedStreamBuffer + 64
12 Unity 0x000000010293d6e5 _ZN15GfxDeviceWorker18RunGfxDeviceWorkerEPv + 117
13 Unity 0x0000000100f245ac _ZN6Thread16RunThreadWrapperEPv + 60
14 libsystem_pthread.dylib 0x00007fff578a86c1 _pthread_body + 340
15 libsystem_pthread.dylib 0x00007fff578a856d _pthread_body + 0
16 libsystem_pthread.dylib 0x00007fff578a7c5d thread_start + 13

Reproduced with:
- macOS Metal Editor
- 2017.2.2p1, 2017.3.2f1, 2018.1.0b11, 2018.2.0b11

Not reproducible with:
- macOS OpenGL Editor
- Windows DirectX Editor
- macOS Metal Standalone Player