Asset fields left empty fail fatally

[wesort]

Bug description

Blueprint has an asset field which is optional. If left blank by the author, frontend throws 500 error.

TypeError
array_merge(): Argument #1 must be of type array, null given

Expected

To reference an asset variable and if it doesn’t exist for it to gracefully fail (eg: show nothing).

How to reproduce

Blueprint

fields:
  -
    handle: portrait
    field:
      type: assets
      container: main
      folder: /
      restrict: false
      max_files: 1
      width: 50
      display: 'Portrait'

_NB: Also tested with adding required: false

Template

{{ assets:portrait }}
  <img ... >
{{ /assets:portrait }}

Content

Field not used and therefore portrait isn’t present with a value.

Logs

No response

Versions

Statamic 3.2.30 Solo Laravel 7.30.6 PHP 8.0.10 statamic/migrator dev-master

Installation

Fresh statamic/statamic site via CLI

Additional details

Caused by augmentation? Regression from the Antlers rewrite?

Workaround

Wrap {{ assets }} tag in a {{ if }} statement

[edalzell]

Why are you using the assets tag? {{ portrait }} should work for you.

[wesort]

That's very good point! I've written them that way for years. Possibly an old convention or it is completely possible that I was wrong to ever do it that way. I was lucky in that it worked until now.

I've adjusted my templating to do it without the assets tag.

I defer to you all on whether assets should result in a 500 error if that variable doesn't exist.

[duncanmcclean]

I've just tested this again and can only reproduce when using the Assets tag ({{ assets:portrait }} instead of {{ portrait }}) and when using the Regex parser.

It doesn't fail when I switch to just looping through the field itself OR switch to the new Runtime parser.

[wesort]

Closing.

Apologies, this should have been closed back in Oct after @duncanmcclean's comment.