Undefined object error from tokens.inc

Patch attached.

I cannot reproduce the problem.

I guess you have also installed Token module, and some module to add tokens in the view mode, like Automatic Entity Labels?

Hmm,
I have committed the patch, since it does not hurt.
But there must be something else wrong in your installation. The same code is used in other fields for Token support.
You state it happens with new node, after adding the new field.
Please check if you are not mixing [node:field_language:langcode] and [node:language:langcode]

Thanks @johnv for merging the fix.

I guess you have also installed Token module, and some module to add tokens in the view mode, like Automatic Entity Labels?

I haven't got the token module installed. If this is the case, shouldn't the module to declare the token and the other contrib module as dependencies from the info file and install them as well during the module installation?

The following bit of code checks the token module service to grab the token type and if not available the module skips from setting up the tokens from the token_info hook.

 $token_type = \Drupal::service('token.entity_mapper')->getTokenTypeForEntityType($entity_type_id);
    if (empty($token_type)) {
      continue;
    }

This seems like token is a strict dependency for this module, hence should be defined in info.yml as a dependency, perhaps this needs to be created as a separate issue?

Token module is not required for this module to work properly.
It is/was however my impression that the hook_tokens was only called by the Token module (Which is not, it is a core hook: https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Utility%2... )

I still cannot reproduce your problem.
Upon saving and displaying a node, you need some extra step in the test script in order to make it reproducable.
It seems you installation is requesting for delta values that do not exist.
What is the cardinality of your field?

Automatically closed - issue fixed for 2 weeks with no activity.