555876 - There is no tab in tabbar after I close all tabs by using middle button quickly while pages are loading

Status: RESOLVED WORKSFORME

(Firefox :: Tabbed Browser, defect)

Description

[Alice0775 White]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US;
                  rv:1.9.3a4pre) Gecko/20100329 Minefield/3.7a4pre ID:20100329040204
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US;
                  rv:1.9.3a4pre) Gecko/20100329 Minefield/3.7a4pre ID:20100329040204

There is no tab in tabbar after I close tabs by using middle button quickly while pages are loading.

Reproducible: Always

Steps to Reproduce:
1. Start Minefield with new profile
2. The following urls Bookmarked in a new folder named "Forder A".
      http://mozilla.jp/firefox/3.0.5/whatsnew/
      http://spreadsheets.google.com/ccc?key=pF_tMaWf14QxNYvZaPTvsGA&hl=en
      https://wiki.mozilla.org/Extension_Manager:Install_Hooks
3. The following urls Bookmarked in a new folder named "Forder B".
      http://www.chromeextensions.org/
      http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/index.html
4. Right click on "Forder A" and Execute "Open All in Tabs".
5. Right click on "Forder B" and Execute "Open All in Tabs".
6. Close all tabs by middle button quickly WHILE PAGES ARE LOADING


Actual Results:
 There is no tab in the tab bar. "Open a new tab" button only.
 
Expected Results:
 There is at least one tab in the tab bar.

Comment 1

[Alice0775 White]

Error in console.

Error: preview is undefined
Source file: file:///D:/firefox-3.7a1pre.en-US.win32/modules/WindowsPreviewPerTab.jsm
Line: 346

Error: browser.webProgress is undefined
Source file: chrome://browser/content/tabbrowser.xml
Line: 1425

Error: this.firstChild is null
Source file: chrome://browser/content/tabbrowser.xml
Line: 2604

Comment 2

[Alice0775 White]

Regression window:

Works:
http://hg.mozilla.org/mozilla-central/rev/7e9d9227f498
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2a1pre) Gecko/20090424 Namoroka/3.6a1pre ID:20090424041640

Fails:
http://hg.mozilla.org/mozilla-central/rev/dfff608ebad0
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2a1pre) Gecko/20090425 Namoroka/3.6a1pre ID:20090425043745

http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=7e9d9227f498&tochange=dfff608ebad0

Comment 3

[Alice0775 White]

in comment #0
s/forder/folder/g

Comment 4

[Dão Gottwald [:dao]]

I don't think I can reproduce this...

Comment 5

[Alice0775 White]

https://hg.mozilla.org/mozilla-central/rev/70dfd4254cf977be2000b41f7a6b97eaada8e2a0
Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0 ID:20160507030302