1254662 - [devtools] CSS Inspector not showing rules when using WebPack HMR [A promise chain failed to handle a rejection on devtools/server/actors/stylesheets.js]

Status: RESOLVED DUPLICATE of bug 1249888

(DevTools :: Inspector: Rules, defect)

Description

[Hiram J. Perez]

Attachment: firefox dev tools not showing rules

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:46.0) Gecko/20100101 Firefox/46.0
Build ID: 20160307004010

Steps to reproduce:

 * Clone https://github.com/davezuko/react-redux-starter-kit
 * Run the demo
 * Try to inspect some element styles

· I've tried disabling e10s and starting with a fresh profile and the problem persists.

· When turning on the browser console I can see this error:
resource://devtools/server/actors/stylesheets.js:1186:0

A promise chain failed to handle a rejection. Did you forget to '.catch', or did you forget to 'return'?
See https://developer.mozilla.org/Mozilla/JavaScript_code_modules/Promise.jsm/Promise

Date: Tue Mar 08 2016 13:58:40 GMT-0600 (CST)
Full Message: Component returned failure code: 0x804b000a (NS_ERROR_MALFORMED_URI) [nsIIOService.newURI]
Full Stack: JS frame :: resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/stylesheets.js :: dirname :: line 1186
JS frame :: resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/stylesheets.js :: StyleSheetActor<._setSourceMapRoot :: line 790
JS frame :: resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/stylesheets.js :: StyleSheetActor<._fetchSourceMap/</map< :: line 763
JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: Handler.prototype.process :: line 933
JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: this.PromiseWalker.walkerLoop :: line 812


Actual results:

CSS Rules are not showing on DevTools CSS panel


Expected results:

CSS Rules should be visible and editable on the DevTools panel

Comment 1

[Loic]

Wait for the next update of Aurora, it'll be fixed.