Debug Build Error on 5.12 - ASSERT: "xs == xData.data() + xData.size()"

EatonCode

I have a program I have been working on since 5.6 and it's been working great with each new version of QT.

Until 5.12, I am getting this error.

https://www.eatoncode.com/resources/shareit/Qt_Creator_2018-12-08_16.40.32.png

https://www.eatoncode.com/resources/shareit/Microsoft_Visual_C%2B%2B_Runtime_Library_2018-12-08_16.42.50.png

"scenegraph\qsgbasicinternalimagenode.cpp" is not part of my program, is this a bug or is there something I need to fix?

When I bump the program back to 5.11.3 everything works correctly.

Thanks in advance.

aha_1980

@EatonCode run your program in a debugger. when it crashes, inspect the stack trace and go up until you reach your code.

Then you'll see what happens.

Good luck!

EatonCode

@aha_1980

There are no stop points in my code that I can check.

It keeps giving me this error.

ASSERT: "xs == xData.data() + xData.size()" in file scenegraph\qsgbasicinternalimagenode.cpp, line 271

which is not part of my code.

https://www.eatoncode.com/resources/shareit/Qt_Creator_2018-12-09_07.15.59.png

Maybe it's a new check on images? I have over 60 images, I have no idea how to clear the libpng warning if that's the issue?

Here it the application OutPut

Program: D:\Qt\5.12.0\msvc2017_64\bin\Qt5Cored.dll
Module: 5.12.0
File: scenegraph\qsgbasicinternalimagenode.cpp
Line: 271

ASSERT: "xs == xData.data() + xData.size()" in file scenegraph\qsgbasicinternalimagenode.cpp, line 271

Hum... The error only happens in debug mode. When I reset to Release and rebuild the program runs without any problems.

Christian Ehrlicher

Please run it in the debugger as @aha_1980 suggested to get a proper backtrace so you can see why the assertion is hit.
The reason why it works in release mode is that there are no assertions active - assertions are a pure debug helper stuff

EatonCode

@Christian-Ehrlicher

Am I missing something about the debugger?

https://www.eatoncode.com/resources/shareit/Desktop_2018-12-09_09.12.47.mp4

Thanks.

Christian Ehrlicher

You have to go up the stack in the stack trace window...

EatonCode

@Christian-Ehrlicher said in Debug Build Error on 5.12 - ASSERT: "xs == xData.data() + xData.size()":

You have to go up the stack in the stack trace window...

@Christian-Ehrlicher - I never did figure it out. tried watching youtube videoes to see what I am missing. I am just going back to an earlier version because it's not breaking at the excepting it's just dying in the main. And when I Retry I am not getting the same error point in QT Creator.

mrjj

Hi
Didnt the video contain the wanted trace ?
alt text

EatonCode

@mrjj I am not sure Qt is providing the Traceback.

The application just quits with a C++ Error. Here is a video. I have to Abort, Retry or Ignore.

I am not quite sure if I select Retry, I am getting the correct info from the Stack Trace.

https://www.eatoncode.com/resources/shareit/Desktop_2018-12-11_00.02.06.mp4

If you have any advise, it would be helpful.

EatonCode

I have finally created a reproduce-able issue with an example.

Here is the video

https://www.eatoncode.com/resources/shareit/Desktop_2019-02-02_23.44.44.mp4

Here is the code.

https://www.eatoncode.com/resources/shareit/buttonqt/demobuttons.zip

So far it works from 5.9 - 5.11.3, but it breaks on 5.12.0, 5.12.1 and 5.13.0 Alpha

In debug mode, I get the xData.data error but I can run in release mode but the hover images do not display correctly on my buttons.

I am using MSVS 2017 32 and 64 bit versions.

Thanks for your help in advance.

Christian Ehrlicher

From my pov this assert was there already in the previous version but you never used the Qt debug libs.
The calculation for the assert looks wrong to me - I've created a bug report: https://bugreports.qt.io/browse/QTBUG-73472

EatonCode

@Christian-Ehrlicher Thanks for looking into my issue, I do appreciate it.

EatonCode

It appears this bug was fixed in 5.12.3 and works in 5.12.4 But does not work correctly in 5.13.0.

Can we carry over the bug fix from 5.12.3 and include it in 5.13.0 ?

Christian Ehrlicher

There is a daily merge from 5.12 to 5.13 to dev so it should appear in 5.13.1.

EatonCode

Correction...

The fix was on 5.12.3

Looks like it's broke on 5.12.4 again.. for some reason it looks like this.

https://www.eatoncode.com/resources/shareit/qtbug_73742_2019-06-24_07.18.28.png

https://www.eatoncode.com/resources/shareit/Desktop_2019-06-24_07.28.31.mp4

At least there is not a fatal error, it's just NOT displaying correctly according to the docs

Buttons works on
5.6.X - 5.11.X
5.12.0 - 5.12.2 - Broke with Error listed above.
5.12.3 - Buttons work perfectly again
5.12.4 - No Error But Example has display issues with 4 square backgrounds. (See above screenshot and movie clip)
5.13.0 - Has same fatal error as 5.12.2

@Christian-Ehrlicher - Ok, I will be checking out 5.13.1 once it comes out. Thanks for the help.

EatonCode

@Christian-Ehrlicher I updated my Qt because of a maintenance update. Now it seems that 5.12.3 is not working.

Is this truly a bug or should I use a different approach?

https://www.eatoncode.com/resources/shareit/qtbug_73742_-_Qt_Creator_2019-07-20_14.38.39.png

Thanks in advance.

aha_1980

Hi @EatonCode,

You should report the issues on https://bugreports.qt.io/browse/QTBUG-73472

That is the only way to reach the responsible maintainers.

Regards

EatonCode

@aha_1980 Hey Thanks... I was not exactly sure I could place or update a bug request myself. But obviously, I can. I uploaded the current bug request.