Toggling a task can give "Tasks: Could not find the correct task line to update"

[claremacrae]

⚠️ Check issue is valid.

• My request is about the Tasks plugin for Obsidian.

⚠️ Check that this issue hasn't been reported before.

• I searched previous Tasks plugin Bug Reports didn't find any similar reports.

Steps to reproduce

1. Download this vault:
   • error.completing.some.tasks.zip
2. Expand the .zip file
3. Open the error completing some tasks folder as a vault
4. Trust the plugins
5. Open the file Reproduction
6. Follow the instructions in the file

Expected Behavior

The first of the - [ ] There is an identical copy of me lines is completed and gets a Done (✅) date

Current behaviour

Video recording of current behaviour:

error.completing.some.tasks.2.mp4

Description of current behaviour:

1. An error message is displayed:

   

2. There is an error displayed in the Console:

   Tasks: Could not find the correct task line to update.
   
   The task line not updated is:
   >   - [ ] There is an identical copy of me
   
   In this markdown file:
   "Test 3.md"
   
   Note: further clicks on this checkbox will usually now be ignored until the file is opened (or certain, specific edits are made - it's complicated).
   
   Recommendations:
   
   1. Close all panes that have the above file open, and then re-open the file.
   
   2. Check for exactly identical copies of the task line, in this file, and see if you can make them different.
   

Which Operating Systems are you using?

• Android
• iPhone/iPad
• Linux
• macOS
• Windows

Obsidian Version

1.8.1

Tasks Plugin Version

7.14.0

Checks

• I have tried it with all other plugins disabled and the error still occurs

Possible solution

I have been trying to understand this on-and-off for a few days now.

I have some notes in which I have figured out the cause, and a likely fix.
For now, I need to move on to some other things, so once this issue is created, I will upload those notes here, so the info is not lost.

[claremacrae]

I have some notes in which I have figured out the cause, and a likely fix.
For now, I need to move on to some other things, so once this issue is created, I will upload those notes here, so the info is not lost.

3267 - bug - could not find the correct task line to update.md

[claremacrae]

I have added a video recording to the "Current behaviour" section above...

[claremacrae]

I have some notes in which I have figured out the cause, and a likely fix.
For now, I need to move on to some other things, so once this issue is created, I will upload those notes here, so the info is not lost.

3267 - bug - could not find the correct task line to update.md

I have also pushed the branch where I was experimenting on this issue:

spike-issue-3267-could-not-find-correct-task

A rough list of the changes it contains:

• Tasks plugin's data.json is edited to turn on:
  • a lot of console output
  • and debug visualisation of stored task location information
• Cache.indexFile() shows a key debug line as an error, so it is shown in red, to make it easier to see the structure in console output
• File.ts has lots more info in debug output
• InlineRenderer.ts and QueryResultsRenderer.ts have a sketch of what a future LineNumberResolver might look like
  • See references to ChatGPT in my linked notes above
• More readable display for the debug visualisation of stored task location information:
  • TaskLineRenderer.ts uses span and a named class for styling
  • Renderer.scss styles that named span
• TaskLineRenderer.ts
  • Calls LineNumberResolver - see above
  • Has comments explaining issues with the current line-number being out-of-date sometimes, by the time the callback for toggling a task in Reading more is executed
• File.test.ts has a smoke test showing how this failure to find the correct task line is reached.