Guard against potential null (#1695)

manodasanW · web-flow · commit b1ecedd61c6f · 2024-08-01T22:48:45.000-07:00
diff --git a/src/WinRT.Runtime/ComWrappersSupport.cs b/src/WinRT.Runtime/ComWrappersSupport.cs
@@ -650,7 +650,8 @@ internal static Type GetRuntimeClassForTypeCreation(IInspectable inspectable, Ty
             // isn't already added.  On JIT, we can construct it at runtime.
             if (!RuntimeFeature.IsDynamicCodeCompiled)
             {
-                if (implementationType.IsInterface && 
+                if (implementationType != null &&
+                    implementationType.IsInterface && 
                     implementationType.IsGenericType &&
                     !TypedObjectFactoryCacheForType.ContainsKey(implementationType))
                 {

Original file line number	Diff line number	Diff line change
`@@ -650,7 +650,8 @@ internal static Type GetRuntimeClassForTypeCreation(IInspectable inspectable, Ty`
`650`	`650`	`// isn't already added. On JIT, we can construct it at runtime.`
`651`	`651`	`if (!RuntimeFeature.IsDynamicCodeCompiled)`
`652`	`652`	`{`
`653`		`- if (implementationType.IsInterface &&`
	`653`	`+ if (implementationType != null &&`
	`654`	`+ implementationType.IsInterface &&`
`654`	`655`	`implementationType.IsGenericType &&`
`655`	`656`	`!TypedObjectFactoryCacheForType.ContainsKey(implementationType))`
`656`	`657`	`{`