1446283 - Empty rule-view with browser console errors

Status: NEW

(DevTools :: Inspector: Rules, defect, P2)

Description

[Patrick Brosset <:pbro>]

Somewhat complicated steps, but this results in an empty rule-view, so kind of bad:

- first open the console in a tab
- then open the browser toolbox
- from the inspector in the browser toolbox, inspect some elements in the "content" console panel
- now, in the "content" toolbox, switch to the inspector

--> the rule-view is empty, and some errors appear in the browser console: "content.text is undefined".
Unfortunately the error is being thrown by a generic catch-all error in the rule-view, and I couldn't get the stack trace (and now, trying to reproduce again, I couldn't). But searching for this string in the code, it looks like it's netmonitor related: devtools/server/actors/stylesheets.js: fetchStylesheetFromNetworkMonitor.

Comment 1

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

Hmm, a bit hard to know the best approach if we can't reproduce...

But, we could potentially add `|| !content.text` here, since the lines following assume it is set:

https://searchfox.org/mozilla-central/rev/3abf6fa7e2a6d9a7bfb88796141b0f012e68c2db/devtools/server/actors/stylesheets.js#475