Settings | Options, switching between tabs crashes QGIS

[bellanz80]

Hi. After installing QGIS 3.16 on windows, I get several crashes and processing plug errors.
Initially I thought they were the plugins of my profile (I have been using QGIS 3.14 since time without any errors, and some plugins).
But no, the error is presented with the clean, new profile.
I did several tests. I had come to the conclusion that the problem was the gray color theme of QGIS (it was the only thing that always changed when creating a new profile).
But in the last tests, it is also presented without changing the color of the theme.

How to reproduce the error:

1. create new profile
2. enter the settings / options menu
3. move between the tabs on the left side
4. in many cases, going through the RENDERING tab causes the crash

Windows 10 64 bit

QGIS 3.16 (stand alone - Osgeo4W)

Stack Trace
QObject::isWidgetType :
QMainWindow::trUtf8 :
QHeaderView::logicalIndexAt :
QWidget::setStyleSheet :
QGIS Info
QGIS Version: 3.16.0-Hannover
QGIS code revision: 43b64b1
Compiled against Qt: 5.11.2
Running against Qt: 5.11.2
Compiled against GDAL: 3.1.4
Running against GDAL: 3.1.4
System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.18362

Video 1

[pigreco]

I confirm

OSGeo4W64b Win 10 64b → clean profile

[roya0045]

Possibly related to the other properties #39720 #39693 and #39615 as it died on the same lines

[bellanz80]

Possibly related to the other properties #39720 #39693 and #39615 as it died on the same lines

Thank you very much for noticing this interesting connection.

[roya0045]

@bellanz80 @pigreco what language is your QGIS in?

[pigreco]

@bellanz80 @pigreco what language is your QGIS in?

Italy

[bellanz80]

@bellanz80 @pigreco what language is your QGIS in?

English

[chleidersdorff]

I can confirm this happens on my machine as well. Language English.

QGIS Info
QGIS Version: 3.16.0-Hannover
QGIS code revision: 43b64b1
Compiled against Qt: 5.11.2
Running against Qt: 5.11.2
Compiled against GDAL: 3.1.4
Running against GDAL: 3.1.4

System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.18363

[imanhn]

@luipir @nyalldawson
I can confirm this fixes the crash.

Ran against Qt 5.11.2

[DelazJ]

Fixed in #39935

[luipir]

Fixed in #39935

closing