How to reproduce:
1. Open the attached "1092432_repro.zip" project
-- Editor crashes

Reproducible with - 2018.1.0b2, 2018.1.9f2, 2018.2.0a1, 2018.2.14f1, 2018.3.0b7, 2019.1.0a6
Not reproducible with - 2017.4.0f1, 2017.4.14f1, 2018.1.0a1, 2018.1.0b1

Notes:
- This crash does not occur after removing .sbsar files from the Assets folder
- Before regression, the project would open without crashing, but with Console errors "A scripted importer attempted to register file type 'sbsar', which is handled by a native Unity importer. Registration rejected. UnityEditor.Experimental.AssetImporters.ScriptedImporter:RegisterScriptedImporters()"

Stack trace:
(Substance.Engine) cppShutdownSubstance
(Substance.Engine) cppShutdownSubstance
(Substance.Engine) cppFreeMemory
(Substance.Engine) cppShutdownSubstance
(Substance.Engine) cppShutdownSubstance
(Substance.Engine) cppShutdownSubstance
ERROR: SymGetSymFromAddr64, GetLastError: 'Attempt to access invalid address.' (Address: 00007FFDC1541631)
(Substance.Engine) (function-name not available)
ERROR: SymGetSymFromAddr64, GetLastError: 'Attempt to access invalid address.' (Address: 00007FFDC1541915)
(Substance.Engine) (function-name not available)
(Substance.Engine) cppInitSubstance
(Mono JIT Code) (wrapper managed-to-native) Substance.Game.NativeFunctions:cppInitSubstance (string)
(Mono JIT Code) Substance.Game.NativeCallbacks:InitSubstance ()
(Mono JIT Code) Substance.Game.Substance:OnEnable ()
(Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)
(mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\mini\mini-runtime.c:2809] mono_jit_runtime_invoke
(mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\object.c:2919] do_runtime_invoke
(mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\object.c:2966] mono_runtime_invoke
(Unity) scripting_method_invoke
(Unity) ScriptingInvocation::Invoke
(Unity) ScriptingInvocation::InvokeChecked
(Unity) MonoBehaviour::CallMethodInactive
(Unity) MonoBehaviour::AwakeFromLoad
(Unity) ResetAndApplyDefaultReferencesOnNewMonoBehaviour
(Unity) Scripting::CreateScriptableObjectWithType
(Unity) ScriptableObject_CUSTOM_CreateScriptableObjectInstanceFromType
(Mono JIT Code) (wrapper managed-to-native) UnityEngine.ScriptableObject:CreateScriptableObjectInstanceFromType (System.Type)
(Mono JIT Code) [C:\buildslave\unity\build\Runtime\Export\ScriptableObject.bindings.cs:34] UnityEngine.ScriptableObject:CreateInstance (System.Type)
(Mono JIT Code) [C:\buildslave\unity\build\Runtime\Export\ScriptableObject.bindings.cs:40] UnityEngine.ScriptableObject:CreateInstance<T_REF> ()
(Mono JIT Code) Substance.Game.Substance:CreateInstance (string,byte[],object,uint[],string[],int[])
(Mono JIT Code) Substance.Editor.SubstanceImporter:OnImportAsset (UnityEditor.Experimental.AssetImporters.AssetImportContext)
(Mono JIT Code) [C:\buildslave\unity\build\Modules\AssetPipelineEditor\Public\ScriptedImporter.cs:21] UnityEditor.Experimental.AssetImporters.ScriptedImporter:GenerateAssetData (UnityEditor.Experimental.AssetImporters.AssetImportContext)
(Mono JIT Code) (wrapper runtime-invoke) <Module>:runtime_invoke_void__this___object (object,intptr,intptr,intptr)
(mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\mini\mini-runtime.c:2809] mono_jit_runtime_invoke
(mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\object.c:2919] do_runtime_invoke
(mono-2.0-bdwgc) [c:\buildslave\mono\build\mono\metadata\object.c:2966] mono_runtime_invoke
(Unity) scripting_method_invoke
(Unity) ScriptingInvocation::Invoke
(Unity) ScriptedImporter::GenerateAssetData
(Unity) AssetDatabaseV1::ImportAsset
(Unity) AssetDatabaseV1::UpdateAsset
(Unity) AssetInterface::ProcessAssetsImplementation
(Unity) AssetInterface::StopAssetEditing
(Unity) AssetInterface::RefreshInternal
(Unity) AssetInterface::Refresh
(Unity) AssetDatabase::Refresh
(Unity) Application::InitializeProject
(Unity) WinMain
(Unity) __scrt_common_main_seh
(KERNEL32) BaseThreadInitThunk
(ntdll) RtlUserThreadStart