Fix Null reference Exception in NodeState for AccessRestrictions (#2894)

romanett · web-flow · commit f431d53c895c · 2024-12-11T08:48:09.000+01:00
* fix cast that throws when Enum is null
diff --git a/Stack/Opc.Ua.Core/Stack/State/NodeState.cs b/Stack/Opc.Ua.Core/Stack/State/NodeState.cs
@@ -3667,7 +3667,7 @@ protected virtual ServiceResult ReadNonValueAttribute(
                         result = onReadAccessRestrictions(context, this, ref accessRestrictions);
                     }
 
-                    if (ServiceResult.IsGood(result))
+                    if (ServiceResult.IsGood(result) && accessRestrictions != null)
                     {
                         value = (ushort)accessRestrictions;
                     }

Original file line number	Diff line number	Diff line change
`@@ -3667,7 +3667,7 @@ protected virtual ServiceResult ReadNonValueAttribute(`
`3667`	`3667`	`result = onReadAccessRestrictions(context, this, ref accessRestrictions);`
`3668`	`3668`	`}`
`3669`	`3669`
`3670`		`- if (ServiceResult.IsGood(result))`
	`3670`	`+ if (ServiceResult.IsGood(result) && accessRestrictions != null)`
`3671`	`3671`	`{`
`3672`	`3672`	`value = (ushort)accessRestrictions;`
`3673`	`3673`	`}`