969297 - Error: this._walker is null when click items, All mouse interaction fails.

Status: RESOLVED WORKSFORME

(DevTools :: Inspector, defect)

Description

[Alice0775 White]

Error: this._walker is null
Source File: resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/devtools/server/actors/highlighter.js
Line: 182

Steps To Reproduce:
1. Open Addons Manager
2. Open Inspector(Ctrl+Shift+C) and close
3. Click items(category, Option/Disable/Enable/Remove buttons etc.)

Comment 1

[Alice0775 White]

This is not only for Addons manager but also for normal web page,

And once the problem happens, all mouse interaction fails.

Steps To Reproduce:
1. Open any Web page
2. Open Inspector(Ctrl+Shift+C) and close
3. Click Link or Select text by mouse

Actual Results:
all mouse interaction fails with the error message.

Expected Results:
No error

Comment 2

[Patrick Brosset <:pbro>]

(In reply to Alice0775 White from comment #0)
> Error: this._walker is null
> Source File: resource://gre/modules/commonjs/toolkit/loader.js ->
> resource://gre/modules/devtools/server/actors/highlighter.js
> Line: 182
> 
> Steps To Reproduce:
> 1. Open Addons Manager
> 2. Open Inspector(Ctrl+Shift+C) and close
> 3. Click items(category, Option/Disable/Enable/Remove buttons etc.)

Can you detail a bit more what you mean in steps 2 and 3?
What do you close?
When you say click items, do you mean selecting an item with the inspector activated?

I haven't been able to reproduce this error.

Could it be related to bug 962478? I have a feeling it is. It would be great if you could try again with the latest nightly (this bug was fixed yesterday) and let me know if this happens again.

Comment 3

[Patrick Brosset <:pbro>]

(In reply to Alice0775 White from comment #1)
> This is not only for Addons manager but also for normal web page,
> 
> And once the problem happens, all mouse interaction fails.
> 
> Steps To Reproduce:
> 1. Open any Web page
> 2. Open Inspector(Ctrl+Shift+C) and close
> 3. Click Link or Select text by mouse
> 
> Actual Results:
> all mouse interaction fails with the error message.
> 
> Expected Results:
> No error
Ah, there was a mid-air collision between comment 1 and comment 2.
Anyway, this confirms my feeling. This is most certainly due to bug 962478.

Comment 4

[Alice0775 White]

Regression window(fx)
Good:
http://hg.mozilla.org/integration/fx-team/rev/3feaef0837d6
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0 ID:20140109001243
Bad:
http://hg.mozilla.org/integration/fx-team/rev/c3145720f680
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0 ID:20140109035343
Pushlog:
http://hg.mozilla.org/integration/fx-team/pushloghtml?fromchange=3c4e2a76f567&tochange=c3145720f680

Regressed by: Bug 916443

Comment 5

[Alice0775 White]

fixed
https://hg.mozilla.org/mozilla-central/rev/dedf12c4e805
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0 ID:20140207030201