Crash when attempting to save an already closed document

Steps to reproduce:

• Open any document
• Click the button immediately to the left of the document name (the one containing the save/close actions)
• While the context menu is open, press the keyboard combo for closing a document (Ctrl+W by default)
• Notice that the context menu is still open and its options are active; click on Save "filename" As...
• The application will crash

Found while bug testing rc1, but can be reproduced on the current stable version as well.