Merge pull request #1215 from KevinH-MS/master

Small optimization for ModuleMetadata matching...

src/ExpressionEvaluator/Core/Source/ExpressionCompiler/MetadataUtilities.cs

@@ -129,6 +129,8 @@ private static PortableExecutableReference MakeAssemblyMetadata(ModuleMetadata m
                     foreach (var handle in reader.AssemblyFiles)
                     {
                         var assemblyFile = reader.GetAssemblyFile(handle);
+                        if (assemblyFile.ContainsMetadata)
+                        {
                             var name = reader.GetString(assemblyFile.Name);
                             // Find the assembly file in the set of netmodules with that name.
                             // The file may be missing if the file is not a module (say a resource)
@@ -146,6 +148,7 @@ private static PortableExecutableReference MakeAssemblyMetadata(ModuleMetadata m
                             }
                         }
                     }
+                }
                 catch (Exception e) when (IsBadMetadataException(e))
                 {
                     // Ignore modules with "bad" metadata.