1567726 - "Error: Can't find the actor ID for stylesheets" when opening browser content toolbox console

Status: RESOLVED FIXED

(DevTools :: Console, defect, P1)

Description

[Oriol Brufau [:Oriol]]

1. Load about:blank (or any page with a content process)
2. Open the browser content toolbox.
   You can use the menu or run this in the browser console:

   var { require } = ChromeUtils.import("resource://devtools/shared/Loader.jsm");
   var { gDevToolsBrowser } = require("devtools/client/framework/devtools-browser");
   gDevToolsBrowser.openContentProcessToolbox(gBrowser);
   

The browser console shows this error:

Error: Can't find the actor ID for stylesheets from root or target actor's form.

I'm using the code above in my patch for bug 1544175, but the error made the test fail. I had to add toolbox.selectTool("jsdebugger"); in order to avoid the problem, this shouldn't be necessary.

Regression window: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=72a737dd8639ab72ddc96d1144f44b06507b915e&tochange=ecb1726e2a622b8181c0d3ef30240a581ceedaf0

Comment 1

[Oriol Brufau [:Oriol]]

Specifically, caused by https://hg.mozilla.org/integration/mozilla-inbound/rev/b1efefe78cb691ed1ece51a12185eb417a783c02

Comment 2

[Nicolas Chevobbe [:nchevobbe]]

Alex, could you have a look please?

Comment 3

[Alexandre Poirot [:ochameau]]

Thanks a lot for the bug report and the regression window!

Comment 4

[Alexandre Poirot [:ochameau]]

Attachment: Bug 1567726 - Do not request stylesheets front for content processes in the source map service.

This actor isn't implemented for processes, but only by browsing context targets.

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/mozilla-central/rev/9522215f449a
Do not request stylesheets front for content processes in the source map service. r=yulia

Comment 6

[Cristina Coroiu [:ccoroiu]]

https://hg.mozilla.org/mozilla-central/rev/9522215f449a

Comment 7

[Ryan VanderMeulen [:RyanVM]]

Is this something we should consider uplifting to Beta for Fx69 or can it ride to release with Fx70?

Comment 8

[Alexandre Poirot [:ochameau]]

This exception may mean that the source maps are broken in the browser content toolbox, but we are not using them there.
So I don't think it is important to uplift.

Comment 9

[Pascal Chevrel:pascalc (PTO until April 26)]

Wontfix for 69 per comment #8

Comment 10

[Intermittent Failures Robot]

4 failures in 4839 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 4

Platform breakdown:

• macosx1014-64-shippable: 2
• macosx1014-64: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1567726&startday=2019-08-12&endday=2019-08-18&tree=all