Subframe request blocked in whitelisted frame

[greiner]

Environment

Ubuntu 16.04
Chrome 71
Adblock Plus 3.4.3 / 3.4.2

How to reproduce

1. Add the custom filters /ad.htm^ and @@/sub.htm$document
2. Create top.htm, sub.htm and ad.htm and launch static web server (see file contents below)
3. Open top.htm (e.g. ​http://localhost:8080/top.htm)

Example file contents

top.htm

<iframe src="sub.htm" height="500"></iframe>

sub.htm

<strong>With srcdoc</strong>
<iframe srcdoc=""></iframe>

<strong>Without srcdoc</strong>
<iframe></iframe>

<script>
let iframes = document.querySelectorAll("iframe");
for (let iframe of iframes) {
  iframe.contentDocument.write(`
    <iframe src="ad.htm"></iframe> 
  `);
}
</script>

ad.htm

ADVERTISEMENT

Observed behavior

• Frame under heading "With srcdoc" failed to load
• Frame under heading "Without srcdoc" loads successfully
• Request to ad.htm is shown in DevTools as being blocked by filter /ad.htm^

Expected behavior

• Both frames load successfully
• Request to ad.htm is not shown in DevTools as being blocked

Further information

This ticket refers to an edge case related to subframes that we didn't cover in #7305.

[sebastian]

Sorry, but we switched to GitLab. If this issue is still relevant, please file it again in the ​new issue tracker.