Prerequisites

• I verified that this is not a filter issue
  • Filter issues MUST be reported at filter issue tracker
• This is not a support issue or a question
  • Support issues and questions are handled at /r/uBlockOrigin
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue
  • Your issue may already be reported.
• I tried to reproduce the issue when...
  • uBlock Origin is the only extension
  • uBlock Origin with default lists/settings
  • using a new, unmodified browser profile
• I am running the latest version of uBlock Origin
• I checked the documentation to understand that the issue I report is not a normal behavior

Description

This EasyList filter is not parsed properly. An error is logged to the background console instead:

/^https:\/\/([a-z]+\.)?sythe\.org\/\[=%#@$&!^].*[\w\W]{20,}/$image

The RegExp is kind of weird, but nevertheless is a valid RegExp.

A specific URL where the issue occurs

chrome://extensions/

Steps to Reproduce

1. Update EasyList or add the filter above to my filters

Expected behavior:

Filter parsed correctly.

Actual behavior:

Error logged to the background console.

Your environment

• uBlock Origin version: 1.27.2
• Browser Name and version: Chrome 84.0.4143.7
• Operating System and version: Windows 10.0.18363.778