Reverse lookup occasionally fails for static filters created via Picker

[uBlock-user]

Description

As above and as discussed in https://github.com/orgs/uBlockOrigin/teams/ublock-issues-volunteers/discussions/176

A specific URL where the issue occurs

https://httpbin.org/

Steps to Reproduce

• Add httpbin.org###operations-tag-HTTP_Methods to "My filters"
• Open the logger
• Navigate to https://httpbin.org/
• Click #operations-tag-HTTP_Methods in the logger -- this invokes reverse-lookup code
• Add any cosmetic filter via element picker for the same page
• Force a reload of the page
• Try to reverse-lookup the newly added filter
• Result: no filter list found

Expected behavior:

Reverse lookup doesn't fail and reveals the filterlist

Actual behavior:

Reverse lookup fails.

Your environment

• uBlock Origin version: 1.25.3rc0
• Browser Name and version: Firefox 76
• Operating System and version: Win 10

[gorhill]

Reproduction may be difficult

It's not. As detailed in previous conversation, you just need to invoke the reverse-lookup code before adding a filter -- you are missing that crucial step in your STR:

1. Add httpbin.org###operations-tag-HTTP_Methods to "My filters"
2. Open the logger
3. Navigate to https://httpbin.org/
4. Click #operations-tag-HTTP_Methods in the logger -- this invokes reverse-lookup code
5. Add any cosmetic filter via element picker for the same page
6. Force a reload of the page
7. Try to reverse-lookup the newly added filter
8. Result: no filter list found

[gorhill]

might be helpful to investigate the issue

[gorhill]

I knew what the issue was when I wrote my above comment, it's the fact that the compiled lists are loaded in the worker before the filter is created.