...

compiler/NubLang/Parsing/Parser.cs

@@ -939,9 +939,9 @@ public sealed class Parser
         _tokenIndex++;
     }
 
-    private IEnumerable<Token> GetTokens(int tokenStartIndex)
+    private List<Token> GetTokens(int tokenStartIndex)
     {
-        return _tokens.Skip(tokenStartIndex).Take(_tokenIndex - tokenStartIndex);
+        return _tokens.Skip(tokenStartIndex).Take(_tokenIndex - tokenStartIndex).ToList();
     }
 }