File report on Missing tasks in parallel steps in Payment Request API

[dontcallmedom-bot]

This pull request was automatically created by Strudy upon detecting errors in Missing tasks in parallel steps in Payment Request API.

Please check that these errors were correctly detected, and that they have not already been reported in https://github.com/w3c/payment-request.

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Title: Missing tasks in parallel steps in Payment Request API
Tracked: N/A
Repo: 'https://github.com/w3c/payment-request'

While crawling Payment Request API, the following algorithms fire an event, or resolve or reject a Promise, within a step that runs in parallel without first queuing a task:

• The algorithm that starts with "The show(optional detailsPromise) method MUST act as follows:" resolves/rejects a promise directly in a step that runs in parallel
• The algorithm that starts with "The complete() method MUST act as follows:" resolves/rejects a promise directly in a step that runs in parallel
• The can make payment algorithm algorithm resolves/rejects a promise directly in a step that runs in parallel

See Dealing with the event loop in the HTML specification for guidance on how to deal with algorithm sections that run in parallel.

_{Cc @dontcallmedom @tidoust}

_{This issue was detected and reported semi-automatically by Strudy based on data collected in webref.}