Outline view breaks if heading is empty with a trailing space

[jonovik]

I'm editing an org-mode document drafted by a colleague, and noticed that the Outline pane showed only the first few headings, or sometimes "No symbols found in document". After some googling, I enabled the development Console and saw "ERR name must not be falsy". After some more trial and error, I think I have identified what breaks the outline view: Asterisks indicating a header, followed only by a space. If it's just the asterisks, the outline does not break. Example:

Source code:

* Top level
** Sub level
** Next subheading is empty without a trailing space
**
** Next has a trailing space
** 
** This heading isn't shown in outline
* Nor is this one

Removing the trailing space after the second empty ** header makes outlines work normally.

The "name must not be falsy" error sounds like it might relate exactly to the empty headings, but I don't know the outline source well enough to check.

Now that I know what causes the glitch, it's an easy workaround to make sure headings are not empty. But maybe it's easy to make the outline more robust, too.