Failed to execute 'clone' on 'Request': Request body is already used

[JackMauro]

Prerequisites

• I verified that this is not a filter list issue. Report any issues with filter lists or broken website functionality in the uAssets issue tracker.
• This is NOT a YouTube, Facebook or Twitch report. These sites MUST be reported by clicking their respective links.
• This is not a support issue or a question. For support, questions, or help, visit /r/uBlockOrigin.
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue.
• The issue is not present after disabling uBO in the browser.
• I checked the documentation to understand that the issue I am reporting is not normal behavior.

I tried to reproduce the issue when...

• uBO is the only extension.
• uBO uses default lists and settings.
• using a new, unmodified browser profile.

Description

I don't know if this is a youtube filter issue or uBlock itself issue.

Watching youtube videos, the logger window show a lot of these errors:

---

[www.youtube.com][json-prune-fetch-response ⁝ reelWatchSequenceResponse.entries.[-].command.reelWatchEndpoint.adClientParams.isAd entries.[-].command.reelWatchEndpoint.adClientParams.isAd ⁝ ] Error: TypeError: Failed to execute 'clone' on 'Request': Request body is already used

[www.youtube.com][json-prune-fetch-response ⁝ playerAds adPlacements adSlots playerResponse.playerAds playerResponse.adPlacements playerResponse.adSlots [].playerResponse.adPlacements [].playerResponse.playerAds [].playerResponse.adSlots ⁝ ] Error: TypeError: Failed to execute 'clone' on 'Request': Request body is already used

[www.youtube.com][json-prune-fetch-response ⁝ playerAds adPlacements adSlots playerResponse.playerAds playerResponse.adPlacements playerResponse.adSlots ⁝ ] Error: TypeError: Failed to execute 'clone' on 'Request': Request body is already used

[www.youtube.com][replace-fetch-response ⁝ /"adSlots.*?}}],"adBreakHeartbeatParams/ ⁝ "adBreakHeartbeatParams ⁝ player?] TypeError: Failed to execute 'clone' on 'Request': Request body is already used

[www.youtube.com][replace-fetch-response ⁝ /"adPlacements.*?([A-Z]"}|"}{2,4})}],/ ⁝ ⁝ player?] TypeError: Failed to execute 'clone' on 'Request': Request body is already used

A specific URL where the issue occurs.

https://www.youtube.com/watch?v=R-aRpWUNILg

Steps to Reproduce

1: create new profile
2: installa ublock origin with default lists selected
3: open logger window
4: visit the page

Expected behavior

no errors

Actual behavior

errors displayed

uBO version

1.59

Browser name and version

Ungoogled Chromium 109

Operating System and version

Windows 7

[garry-ut99]

• I verified that this is not a filter list issue. Report any issues with filter lists or broken website functionality in the uAssets issue tracker.
• I checked the documentation to understand that the issue I am reporting is not normal behavior.
  I don't know if this is a youtube filter issue or uBlock itself issue.
  [www.youtube.com][json-prune-fetch-response
[www.youtube.com][replace-fetch-response

What you pasted from Logger are entries related to uBlock filters/scriptlets, see documentation:

• https://github.com/gorhill/uBlock/wiki/Resources-Library#json-prune-fetch-responsejs-
• https://github.com/gorhill/uBlock/wiki/Resources-Library#trusted-replace-fetch-responsejs-

In such cases, it's a filter issue, and it should be always reported and asked in filters tracker:

• 🟥 ALL YouTube issues: D-O-N-'T COMMENT without reading the 1st post🟥 uAssets#20586

In case it will turn out to be a bug in uBlock, filter maintentainers will move the issue here, so it's not a problem.

[gorhill]

Expected behavior
no errors

Why? Errors in scriptlets are not unexpected, the logger merely reports them.