fixes #2369

retailcoder · retailcoder · commit 078f5a4bc77e · 2016-11-20T15:10:42.000-05:00
diff --git a/Rubberduck.VBEEditor/SafeComWrappers/ComWrapperEnumerator.cs b/Rubberduck.VBEEditor/SafeComWrappers/ComWrapperEnumerator.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Linq;
 
 namespace Rubberduck.VBEditor.SafeComWrappers
 {
@@ -13,7 +14,9 @@ public class ComWrapperEnumerator<TWrapperItem> : IEnumerator<TWrapperItem>
         public ComWrapperEnumerator(IEnumerable source, Func<object, TWrapperItem> itemWrapper)
         {
             _itemWrapper = itemWrapper;
-            _internal = source.GetEnumerator();
+            _internal = source == null 
+                ? Enumerable.Empty<TWrapperItem>().GetEnumerator() 
+                : source.GetEnumerator();
         }
 
         public void Dispose()

Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,7 @@`
`1`	`1`	`using System;`
`2`	`2`	`using System.Collections;`
`3`	`3`	`using System.Collections.Generic;`
	`4`	`+using System.Linq;`
`4`	`5`
`5`	`6`	`namespace Rubberduck.VBEditor.SafeComWrappers`
`6`	`7`	`{`
`@@ -13,7 +14,9 @@ public class ComWrapperEnumerator<TWrapperItem> : IEnumerator<TWrapperItem>`
`13`	`14`	`public ComWrapperEnumerator(IEnumerable source, Func<object, TWrapperItem> itemWrapper)`
`14`	`15`	`{`
`15`	`16`	`_itemWrapper = itemWrapper;`
`16`		`- _internal = source.GetEnumerator();`
	`17`	`+ _internal = source == null`
	`18`	`+ ? Enumerable.Empty<TWrapperItem>().GetEnumerator()`
	`19`	`+ : source.GetEnumerator();`
`17`	`20`	`}`
`18`	`21`
`19`	`22`	`public void Dispose()`