google-ima.js causes leftover with error on tver.jp (Chromium only)

[Yuki2718]

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

On tver.jp and seemingly only on Chrome, uBO version of google-ima.js sometimes causes ad leftover with "TypeError: Cannot read properties of undefined (reading 'getContentType')"

AdGuard extension doesn't have this issue. getContentType is called in https://tver.jp/_next/static/chunks/2841-5411df673d933784.js.

A specific URL where the issue occurs.

https://tver.jp/ (may require a Japanese IP)

Steps to Reproduce

1. Visit the page on Chrome with AdGuard Japanese enabled
2. If not reproduced, hard-refresh several times

Expected behavior

No leftover or error

Actual behavior

Described

uBO version

1.67.0

Browser name and version

Chrome 142.0.7444.176

Operating System and version

Windows 11

[gorhill]

Using .jp server, with JAP list enabled, I am unable to see a hit on ima3 in the logger, after repeatedly forcing a hard reload.

[gorhill]

Looking at the line number in the console your screenshot, it seems this is occurring at that line:

https://github.com/gorhill/uBlock/blob/19db28c810e0ae6dff7d2d207f4ceee10e9ac392/src/web_accessible_resources/google-ima.js#L345

The error is just the shim outputting on exception. AdGuard could also be throwing, except it might not output at the console.

[Yuki2718]

Oh, I forgot to say enabling AdGuard Japanese is mandatory. Strange, don't you see in the logs or network requests?

[gorhill]

I don't see anything related to ima in the dev tools either, even with uBO disabled. Are you logged in?

[Yuki2718]

Are you logged in?

No, just visiting the site should be enough.

[ghajini]

if you mean empty space in middle of page

i can reproduce on firefox ,singapore ip(browsec vpn)

1. with adguard jp list enabled, go to https://tver.jp/
2. click on marked

3. then here

4. error on my side

[Yuki2718]

yeah, and that will disappear if you badfilter

||imasdk.googleapis.com/js/sdkloader/ima3.js$script,redirect=google-ima.js,domain=tver.jp,important

[gorhill]

click on marked

I don't have that marked area (the "person" icon) on my side:

[ghajini]

You can click tv icon(below search on the left side) then click back on home icon

[Yuki2718]

I don't think you have to click that, just refresh several times is enough for me. But ima is always called regardless.

[Yuki2718]

I don't have that marked area (the "person" icon) on my side:

Oh, okay, so you see someting different with us. What VPN are you using?

[gorhill]

Still no luck reproducing no matter what I try -- never an instance of imasdk in logger.

What VPN are you using?

Mozilla VPN (which is actually Mullvad)

[Yuki2718]

Hmm, I see that "マイページ" with Mullvad's Japanese server. Also tested changing browser locale, but no change.

[Yuki2718]

Looking at the line number in the console your screenshot, it seems this is occurring at that line:

https://github.com/gorhill/uBlock/blob/19db28c810e0ae6dff7d2d207f4ceee10e9ac392/src/web_accessible_resources/google-ima.js#L345

The error is just the shim outputting on exception. AdGuard could also be throwing, except it might not output at the console.

While it always breaks if I put a break point at L345, a break point at L480 as per the error message is not caught if the issue doesn't happen. I guess I have to dig it deeper.