File report on [shape-detection-api] Missing tasks in parallel steps …

…in Accelerated Shape Detection in Images

issues/shape-detection-api-missingtask.md

@@ -0,0 +1,16 @@
+---
+Title: >-
+  [shape-detection-api] Missing tasks in parallel steps in Accelerated Shape
+  Detection in Images
+Tracked: N/A
+Repo: 'https://github.com/WICG/shape-detection-api'
+---
+
+While crawling [Accelerated Shape Detection in Images](https://wicg.github.io/shape-detection-api/), the following algorithms fire an event, or resolve or reject a Promise, within a step that runs [in parallel](https://html.spec.whatwg.org/multipage/infrastructure.html#in-parallel) without first queuing a task:
+* [ ] The [BarcodeDetector/getSupportedFormats()](https://wicg.github.io/shape-detection-api/#dom-barcodedetector-getsupportedformats) algorithm resolves/rejects a promise directly in a step that runs in parallel
+
+See [Dealing with the event loop](https://html.spec.whatwg.org/multipage/webappapis.html#event-loop-for-spec-authors) in the HTML specification for guidance on how to deal with algorithm sections that run *in parallel*.
+
+<sub>Cc @dontcallmedom @tidoust</sub>
+
+<sub>This issue was detected and reported semi-automatically by [Strudy](https://github.com/w3c/strudy/) based on data collected in [webref](https://github.com/w3c/webref/).</sub>