1287802 - Rule view is empty on about:home

Status: RESOLVED DUPLICATE of bug 1287607

(DevTools :: Inspector: Rules, defect, P1)

Description

[Julian Descottes [:jdescottes]]

Regression from Bug 1282660.

STRs:
- go to about:home
- open devtools>inspector

ER: Rule view should display selected element rules
AR: Rule view is empty

Comment 1

[Julian Descottes [:jdescottes]]

In the console the following error is logged:

> mainThreadFetch@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/DevToolsUtils.js:500:5
> StyleSheetActor<._getText@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/stylesheets.js:468:12
> StyleSheetActor<.getText@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/stylesheets.js:422:12
> StyleRuleActor<.getAuthoredCssText@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/styles.js:1237:12
> PageStyleActor<.getApplied<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/styles.js:459:13
> TaskImpl.prototype._run@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/task.js:311:39
> Handler.prototype.process@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:937:23
> this.PromiseWalker.walkerLoop@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:816:7
> Promise*this.PromiseWalker.scheduleWalkerLoop@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:747:11
> this.PromiseWalker.schedulePromise@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:779:7
> Promise.prototype.then@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:454:5
> TaskImpl.prototype._handleResultValue@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/task.js:387:7
> TaskImpl.prototype._run@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/task.js:319:13
> TaskImpl@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/task.js:273:3
> createAsyncFunction/asyncFunction@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/task.js:247:14
> generateRequestHandlers/</handler@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/protocol.js:1044:19
> onPacket@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/main.js:1648:15
> ChildDebuggerTransport.prototype.receiveMessage@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/transport/transport.js:743:7
> console.error: 
>   Protocol error (unknownError): Failed to open input source 'chrome://browser/content/abouthome/aboutHome.css'
> 

The regression window points at Bug 1282660, and reverting the changes in devtools/server/actors/stylesheets.js fixes the issue.
Tim: would you like to follow up on this?