Fixing issue with runtime policy evaluation

Author: fabiocav

src/WebJobs.Script/Description/DotNet/FunctionAssemblyLoadContext.cs

@@ -155,8 +155,8 @@ private static bool IsMinorMatchOrLowerPolicyEvaluator(AssemblyName requestedAss
         {
             AssemblyName runtimeAssemblyName = AssemblyNameCache.GetName(runtimeAssembly);
 
-            return requestedAssembly.Version.Major == runtimeAssemblyName.Version.Major &&
-                requestedAssembly.Version.Minor <= runtimeAssemblyName.Version.Minor;
+            return requestedAssembly.Version == null || (requestedAssembly.Version.Major == runtimeAssemblyName.Version.Major &&
+                requestedAssembly.Version.Minor <= runtimeAssemblyName.Version.Minor);
         }
 
         private bool IsRuntimeAssembly(AssemblyName assemblyName)

test/WebJobs.Script.Tests/Description/DotNet/FunctionAssemblyLoadContextTests.cs

@@ -28,8 +28,8 @@ public class FunctionAssemblyLoadContextTests
         [InlineData("Microsoft.Azure.WebJobs.Script, Version=3.0.0.0")]
         [InlineData("Microsoft.Azure.WebJobs.Script.Grpc, Version=3.0.0.0")]
         [InlineData("Microsoft.Azure.WebJobs.Script.WebHost, Version=3.0.0.0")]
-        [InlineData("Microsoft.Azure.WebSites.DataProtection, Version=0.0.0.0")]
-        [InlineData("System.IO, Version=0.0.0.0")] // System.*
+        [InlineData("Microsoft.Azure.WebSites.DataProtection")]
+        [InlineData("System.IO")] // System.*
         public void RuntimeAssemblies_AreLoadedInDefaultContext(string assemblyName)
         {
             var functionContext = new FunctionAssemblyLoadContext(AppContext.BaseDirectory);