Unity Issue Tracker - [Shader Graph] NullReferenceException error thrown on selecting any property in Blackboard window in Subgraph Shader Graph

Duplicate

Votes

28

Found in [Package]

12.0.0, 11.0.0.

Issue ID

1318882

Regression

Yes

[Shader Graph] NullReferenceException error thrown on selecting any property in Blackboard window in Subgraph Shader Graph

Package: Shader Graph

Mar 03, 2021

-ArgumentNullException error is thrown on deleting property from the Blackboard window.
-NullReferenceException error thrown on selecting any property in Blackboard window in Subgraph Shader Graph.

Steps to repro:
1. Create a new HDRP template project.
2. Project > Click on "+" > Shader > SubGraph.
3. Open SubGraph > Blackboard > Click on "+" > Vector2.
4. Select Vector2 property.

Actual Result:
NullReferenceException error thrown in the console.

Expected Result:
No error in the console.

Reproducible in:
2021.2.0a7, 2021.1.0b10, 2021.1.0a10 with Package version 12.0.0, 11.0.0.

Working Fine in:
2021.1.a9, 2020.2.7f1 with Package version 10.3.2, 10.3.1.
2021.1.17f1 with Package version 9.0.0-preview.71.
2019.4.21f with Package version 7.5.3.

Environment:
Occurring on Windows 10 & Mac 10.15.

Stack trace:
NullReferenceException: Object reference not set to an instance of an object
UnityEditor.ShaderGraph.Drawing.Inspector.PropertyDrawers.ShaderInputPropertyDrawer.UpdateEnableState () (at Library/PackageCache/com.unity.shadergraph@11.0.0/Editor/Drawing/Inspector/PropertyDrawers/ShaderInputPropertyDrawer.cs:142)
UnityEditor.ShaderGraph.Drawing.Inspector.PropertyDrawers.ShaderInputPropertyDrawer.DrawProperty (System.Reflection.PropertyInfo propertyInfo, System.Object actualObject, UnityEditor.ShaderGraph.Drawing.InspectableAttribute attribute) (at Library/PackageCache/com.unity.shadergraph@11.0.0/Editor/Drawing/Inspector/PropertyDrawers/ShaderInputPropertyDrawer.cs:108)
UnityEditor.ShaderGraph.Drawing.Inspector.InspectorUtils.GatherInspectorContent (System.Collections.Generic.List`1[T] propertyDrawerList, UnityEngine.UIElements.VisualElement outputVisualElement, UnityEditor.ShaderGraph.Drawing.IInspectable inspectable, System.Action propertyChangeCallback, UnityEditor.ShaderGraph.Drawing.IPropertyDrawer propertyDrawerToUse) (at Library/PackageCache/com.unity.shadergraph@11.0.0/Editor/Drawing/Inspector/InspectorView.cs:195)
UnityEditor.ShaderGraph.Drawing.Inspector.InspectorView.DrawInspectable (UnityEngine.UIElements.VisualElement outputVisualElement, UnityEditor.ShaderGraph.Drawing.IInspectable inspectable, UnityEditor.ShaderGraph.Drawing.IPropertyDrawer propertyDrawerToUse) (at Library/PackageCache/com.unity.shadergraph@11.0.0/Editor/Drawing/Inspector/InspectorView.cs:140)
UnityEditor.ShaderGraph.Drawing.Inspector.InspectorView.Update () (at Library/PackageCache/com.unity.shadergraph@11.0.0/Editor/Drawing/Inspector/InspectorView.cs:126)
UnityEditor.ShaderGraph.Drawing.GraphEditorView.HandleGraphChanges (System.Boolean wasUndoRedoPerformed) (at Library/PackageCache/com.unity.shadergraph@11.0.0/Editor/Drawing/Views/GraphEditorView.cs:654)
UnityEditor.ShaderGraph.Drawing.MaterialGraphEditWindow.Update () (at Library/PackageCache/com.unity.shadergraph@11.0.0/Editor/Drawing/MaterialGraphEditWindow.cs:330)
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()

ArgumentNullException: Value cannot be null.
Parameter name: identifier
UnityEditor.Undo.RegisterCompleteObjectUndo (UnityEngine.Object objectToUndo, System.String name) (at <c2e9ddac9be94c64888ec1c467657510>:0)
UnityEditor.Graphing.GraphObject.RegisterCompleteObjectUndo (System.String actionName) (at Library/PackageCache/com.unity.shadergraph@11.0.0/Editor/Data/Implementation/GraphObject.cs:54)
UnityEditor.ShaderGraph.Drawing.MaterialGraphView.DeleteSelectionImplementation (System.String operationName, UnityEditor.Experimental.GraphView.GraphView+AskUser askUser) (at Library/PackageCache/com.unity.shadergraph@11.0.0/Editor/Drawing/Views/MaterialGraphView.cs:891)
UnityEditor.ShaderGraph.Drawing.MaterialGraphView+<>c__DisplayClass38_0.<BuildContextualMenu>b__5 (UnityEngine.UIElements.DropdownMenuAction e) (at Library/PackageCache/com.unity.shadergraph@11.0.0/Editor/Drawing/Views/MaterialGraphView.cs:343)
UnityEngine.UIElements.DropdownMenuAction.Execute () (at <1c96b7a3f7794c85b453037183b01ec4>:0)
UnityEditor.UIElements.EditorMenuExtensions+<>c__DisplayClass1_0.<PrepareMenu>b__0 () (at <cfee44c50c74452d92e0643773711d9d>:0)
UnityEditor.GenericMenu.CatchMenu (System.Object userData, System.String[] options, System.Int32 selected) (at <c2e9ddac9be94c64888ec1c467657510>:0)

This is a duplicate of issue #1328377

"ArgumentNullException: Value cannot be null." is thrown when adding any property into a Sub Graph

Resolution Note:

Bug never reproduced in 21.2 as far as I can tell (did not repro in a7 or a6), making this case a duplicate of case 1328377, which was fixed in 2021.1.7f1 (11.0.0)

Comments (14)

Korindian

Apr 17, 2021 17:56

Yes, cannot even create shaders due to this problem on HDRP 11, 2020.1.3f1. This needs an emergency hot fix please!!!
HG_SB

Apr 12, 2021 07:14

Any ETA on when this fix will release? It´s impossible to work with SubGraphs at the moment due to this.
This is breaking an essential package marked as "production ready" so I would assume this would have high priority.
marras1994

Apr 08, 2021 09:21

Same happening on Mac Os 10.15.17, Unity 2021.1.1f1 and Shadergraph 11.

I migrated a project from Unity 2020 to 2021 and now my graph are broken when I try to edit them.
Aalegre

Apr 05, 2021 12:53

This also happens on URP for me.
I'm using Shadergraph version 11, and unity version 2021.1.1