Undefined array key "value" in massageFormValues() following PHP 8.4 upgrade [#3569293]

Problem/Motivation

After upgrading Drupal core from 11.2.8 to 11.3.2 and updating PHP from 8.3 to 8.4, I started seeing these warnings every time I save a node with the metatag async widget when I have not overwritten any metatags.

Warning: Undefined array key "value" in                      
  Drupal\metatag_async_widget\Plugin\Field\FieldWidget\AsyncMetatagFirehose->massageFormValues() (line 253 of modules/contrib/metatag_async_widget/src/Plugin/Field/FieldWidget/AsyncMetatagFirehose.php).

Steps to reproduce

Configure a content type to use the metatag async widget
Create a node of that type
Do not use the widget to override any metatags
Save the node
Get the warning

Proposed resolution

I will submit a patch shortly.

Comment	File	Size	Author
#2	metatag_async_widget-3569293-undefined-warning-2.patch	676 bytes	banoodle

Issue fork metatag_async_widget-3569293

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3569293-undefined-array-key changes, plain diff MR !10
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Comments

Comment #1

23 January 2026 at 20:31

banoodle created an issue. See original summary.

Comment #2

banoodle commented 23 January 2026 at 20:37

Status:

Active

» Needs review

Status	File	Size
new	metatag_async_widget-3569293-undefined-warning-2.patch	676 bytes

Attaching patch.

Comment #3

d.fisher commented 26 January 2026 at 16:27

Status:

Needs review

» Reviewed & tested by the community

Thank you to @banoodle for the report and the fix. I was also seeing this issue after upgrading Drupal core from 11.2.8 to 11.3.2 and updating PHP from 8.3 to 8.4 and can confirm that the patch resolves the issue. Marking as RTBC.