`array argument is not an NSArray` on switch branch
![](https://i.imgur.com/RLzYlHl.png)
2016-05-20 09:22:53.584 sketchtool[6079:429153] Error: caught exception whilst decoding (version 85):**\* -[MSUnarchiver decodeObjectForKey:]: cannot decode object of class (MSImmutableSymbolMaster) for key (NS.object.0); the class may be defined in source code or a library that is not linked
Failed to open document source.sketch -- file:///Users/lajlev/Sites/boligportal/design/projects/160519reate      0x7f92df6cf600lace220Upsell/
((null) MSDocumentDomain:11)
