1812209 - Failed to load the main window due to `can't access property "contentWindow", win.messageBrowser is undefined`

Status: RESOLVED WORKSFORME

(Thunderbird :: Message Reader UI, defect)

Description

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Failed to initialize the main window with the following error in 111.0a1 (2023-01-24) (64-bit):

Uncaught TypeError: can't access property "contentWindow", win.messageBrowser is undefined
    openTab chrome://messenger/content/mailTabs.js:76
    _cloneTemplate chrome://messenger/content/mailTabs.js:51
mailTabs.js:76:11
    openTab chrome://messenger/content/mailTabs.js:76
    _cloneTemplate chrome://messenger/content/mailTabs.js:51

The source code is around here:
https://searchfox.org/comm-central/rev/32293d030d9d655caa4e2eca68ee838350c8cb36/mail/base/content/mailTabs.js#76

Comment 1

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Attachment: screenshot

Comment 2

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

The first bad build is: https://ftp.mozilla.org/pub/thunderbird/nightly/2023/01/2023-01-20-09-52-00-comm-central/

Comment 3

[Alice0775 White]

regression window:
https://hg.mozilla.org/comm-central/pushloghtml?fromchange=76f62fd3a78092592457e19dbc6e59f87c4f084d&tochange=5abcc1359eb7d4122f958a823e29b43de5f60b2e

Comment 4

[Alessandro Castellani [:aleca]]

This is known to happen if you cancel the account setup tab. Is this the case?

Comment 5

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

No, I reproduced this when I updated the Daily and restarted with existing profile.

Comment 6

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

I updated Daily yesterday, but I cannot reproduce this anymore.