Empty tags in post causes merge failure.

[edwardhorsford]

I'm unsure if this is quite a bug, but it's an area where eleventy could have a bit better error handling.

If tags exists in frontmatter but is empty (null?), merging with data files fails.

It would help if eleventy coerced empty tags to [] or something.

I think this section would want to be edited to test for null. edit: pr submitted

Why I have empty tags:

I create most of my posts from a template file with a load of front-matter prepopulated, like this:

---
title: TITLE
subtitle: This is the title
date: YYYY-MM-DD
tags: 
location:
venue:
people:
trip:
series:
primaryImage: path/to/the/image.jpg
---

[[CONTENT HERE]]

Up until now, I've always had tags on posts. But I'm now moving to deepDataMerge where my one common tag (to set a post type) is in a data file.

It seems the merge of page and data file fails if tags exists but is empty.

You could argue I don't need it above - I find it helpful to remind me what things I might want to add - and I hope an empty item shouldn't cause a crash.

[zachleat]

Fixed in #557, thank you!