FIX: InputSystem warnings displayed with Unity editor 6000.6 version

Assets/Tests/InputSystem.Editor/InputActionReferenceEditorTests.cs

@@ -98,7 +98,7 @@ private void DisableDomainReloads()
         EditorPrefsTestUtils.DisableDomainReload();
     }
 
-    private static InputActionBehaviour GetBehaviour() => Object.FindFirstObjectByType<InputActionBehaviour>();
+    private static InputActionBehaviour GetBehaviour() => Object.FindAnyObjectByType<InputActionBehaviour>();
     private static InputActionAsset GetAsset() => AssetDatabase.LoadAssetAtPath<InputActionAsset>(assetPath);
 
     // For unclear reason, NUnit fails to assert throwing exceptions after transition into play-mode.

Assets/Tests/InputSystem/Plugins/UITests.cs

@@ -4601,6 +4601,7 @@ private class UICallbackReceiver : MonoBehaviour, IPointerClickHandler, IPointer
         IPointerMoveHandler, IPointerExitHandler, IPointerUpHandler, IMoveHandler, ISelectHandler, IDeselectHandler,
         IInitializePotentialDragHandler, IBeginDragHandler, IDragHandler, IEndDragHandler, IDropHandler, ISubmitHandler, ICancelHandler, IScrollHandler
     {
+        [Serializable]
         public struct Event
         {
             public EventType type { get; }

Packages/com.unity.inputsystem/InputSystem/Controls/AxisControl.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Runtime.CompilerServices;
 using UnityEngine.InputSystem.LowLevel;
 using UnityEngine.InputSystem.Processors;
@@ -16,6 +17,7 @@ namespace UnityEngine.InputSystem.Controls
     /// Can optionally be configured to perform normalization.
     /// Stored as either a float, a short, a byte, or a single bit.
     /// </remarks>
+    [Serializable]
     public class AxisControl : InputControl<float>
     {
         /// <summary>

Packages/com.unity.inputsystem/InputSystem/Controls/ButtonControl.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Runtime.CompilerServices;
 using UnityEngine.InputSystem.LowLevel;
 using UnityEngine.Scripting;
@@ -15,6 +16,7 @@ namespace UnityEngine.InputSystem.Controls
     /// yield full floating-point values and may thus have a range of values. See
     /// <see cref="pressPoint"/> for how button presses on such buttons are handled.
     /// </remarks>
+    [Serializable]
     public class ButtonControl : AxisControl
     {
         private bool m_NeedsToCheckFramePress = false;

Packages/com.unity.inputsystem/InputSystem/Controls/InputControl.cs

@@ -83,6 +83,7 @@ namespace UnityEngine.InputSystem
     /// <seealso cref="InputDevice"/>
     /// <seealso cref="InputControlPath"/>
     /// <seealso cref="InputStateBlock"/>
+    [Serializable]
     [DebuggerDisplay("{DebuggerDisplay(),nq}")]
     public abstract class InputControl
     {
@@ -1283,6 +1284,7 @@ internal virtual IEnumerable<object> GetProcessors()
     /// <typeparam name="TValue">Type of value captured by the control. Note that this does not mean
     /// that the control has to store data in the given value format. A control that captures float
     /// values, for example, may be stored in state as byte values instead.</typeparam>
+    [Serializable]
     public abstract class InputControl<TValue> : InputControl
         where TValue : struct
     {

Packages/com.unity.inputsystem/InputSystem/Editor/Internal/InputStateWindow.cs

@@ -400,7 +400,7 @@ private void DrawHexDump()
         // against any mutations.
         // When inspecting controls (as opposed to events), we copy all their various
         // state buffers and allow switching between them.
-        [SerializeField] private byte[][] m_StateBuffers;
+        [NonSerialized] private byte[][] m_StateBuffers;
         [SerializeField] private int m_SelectedStateBuffer;
         [SerializeField] private bool m_CompareStateBuffers;
         [SerializeField] private bool m_ShowDifferentOnly;

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/InputActionsEditorState.cs

@@ -59,6 +59,8 @@ private int GetActionMapIndex(InputActionsEditorState state)
             return cutActionMapIndex ?? -1;
         }
     }
+
+    [Serializable]
     internal struct InputActionsEditorState
     {
         public int selectedActionMapIndex { get {return m_selectedActionMapIndex; } }

Packages/com.unity.inputsystem/InputSystem/State/InputStateBuffers.cs

@@ -13,6 +13,7 @@ namespace UnityEngine.InputSystem.LowLevel
     // Internally, we perform only a single combined unmanaged allocation for all state
     // buffers needed by the system. Externally, we expose them as if they are each separate
     // buffers.
+    [Serializable]
     internal unsafe struct InputStateBuffers
     {
         // State buffers are set up in a double buffering scheme where the "back buffer"

Packages/com.unity.inputsystem/InputSystem/Utilities/FourCC.cs

@@ -11,6 +11,7 @@ namespace UnityEngine.InputSystem.Utilities
     /// FourCCs are frequently used in the input system to identify the format of data sent to or from
     /// the native backend representing events, input device state or commands sent to input devices.
     /// </remarks>
+    [Serializable]
     public struct FourCC : IEquatable<FourCC>
     {
         private int m_Code;