<![CDATA[My Qt creator broke ?]]>I was coding like usual, and at some point i just wanted to test what i did so i ran a "build" and "run", what happened then was quite surprising, i got close to a hundred of issues with up to 20 errors, but what was really surpising is that i could not understand those, i was having issues with QObject itself.

From "class 'QObject' is implicitly friends with itself" to "redefinition of 'class QObject'", after a while trying to figure out what evil deed i may have done, i just closed everything and created a new project, but nothing is working anymore, new projects can't even recognize what a "QWidget" is.

I am at a loss here, should i just uninstall and reinstall Qt Creator ? how is that even possible in the first place to break everything like that without doing anything else but use the software.

I didn't change anything, i was just coding.

]]>https://forum.qt.io/topic/97960/my-qt-creator-brokeRSS for NodeSun, 12 Apr 2026 20:12:25 GMTWed, 26 Dec 2018 02:50:41 GMT60<![CDATA[Reply to My Qt creator broke ? on Fri, 28 Dec 2018 03:48:53 GMT]]>@aha_1980 I voted

]]>https://forum.qt.io/post/501745https://forum.qt.io/post/501745Fri, 28 Dec 2018 03:48:53 GMT<![CDATA[Reply to My Qt creator broke ? on Thu, 27 Dec 2018 06:59:11 GMT]]>@mrjj Then please vote for the bug :)

]]>https://forum.qt.io/post/501589https://forum.qt.io/post/501589Thu, 27 Dec 2018 06:59:11 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 21:50:08 GMT]]>@aha_1980
i have done it twice ... Until i learned to always check affected files. ;)

]]>https://forum.qt.io/post/501542https://forum.qt.io/post/501542Wed, 26 Dec 2018 21:50:08 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 20:05:38 GMT]]>Hi @reonZ,

I'm glad you fixed it. Nevertheless, your suggestion to make the files read-only is very good.

I created QTBUG-72766 to track that.

Regards

]]>https://forum.qt.io/post/501517https://forum.qt.io/post/501517Wed, 26 Dec 2018 20:05:38 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 14:51:33 GMT]]>@KazuoAsano Yeah at least now i am fine with re-installing everything, because i know what the problem was and how to avoid it in the future.

Also doing so i realized that there was a 5.12 version which makes it "convenient" to change now.

]]>https://forum.qt.io/post/501498https://forum.qt.io/post/501498Wed, 26 Dec 2018 14:51:33 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 08:39:36 GMT]]>@reonZ , I'm glad that the problem seems to be solved.

In this case, it may be difficult to make the read-only installed file at the usability of the Qt Maintenance Tool.
In my case, I will press F1 before opening the library code, I open help documents and check the API :)

]]>https://forum.qt.io/post/501477https://forum.qt.io/post/501477Wed, 26 Dec 2018 08:39:36 GMT<![CDATA[Reply to My Qt creator broke ? on Fri, 28 Dec 2018 03:54:06 GMT]]>@aha_1980

I believe that i must have done a rename that modified a bunch of source files, i would never have imagined that the source files could be modified like that from inside the editor itself, how come is that even possible ? why are they not read only or just protected ?

]]>https://forum.qt.io/post/501471https://forum.qt.io/post/501471Fri, 28 Dec 2018 03:54:06 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 07:11:52 GMT]]>@reonZ well, you could pick rhe files from a source download like http://download.qt.io/official_releases/qt/5.11/5.11.2/single/qt-everywhere-src-5.11.2.zip

but probably its easier to remove + reinstall Qt 5.11.2 with the online installer/maintenance tool

As for the damage: Did you do a Rename Usages before that could have effected the Qt headers?

]]>https://forum.qt.io/post/501470https://forum.qt.io/post/501470Wed, 26 Dec 2018 07:11:52 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 07:05:11 GMT]]>@KazuoAsano

Well it seems like some files have been modified, is there a way to get them back without re-downloading everything ?

It seems like i just need the includes files, at least i want to try with that before anything else.

]]>https://forum.qt.io/post/501469https://forum.qt.io/post/501469Wed, 26 Dec 2018 07:05:11 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 06:40:09 GMT]]>Kits setting look correct.

I would like check that your Qt headers haven't been modified by replace etc ...

v5.11.2 code
QMainWindow.h:
http://code.qt.io/cgit/qt/qtbase.git/tree/src/widgets/widgets/qmainwindow.h?h=v5.11.2

QWidget.h:
http://code.qt.io/cgit/qt/qtbase.git/tree/src/widgets/kernel/qwidget.h?h=v5.11.2

QObject.h:
http://code.qt.io/cgit/qt/qtbase.git/tree/src/corelib/kernel/qobject.h?h=v5.11.2

]]>https://forum.qt.io/post/501468https://forum.qt.io/post/501468Wed, 26 Dec 2018 06:40:09 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 06:28:01 GMT]]>@kenchan

I did that already, but like i said, even a brand new project won't work now, it is not limited to projects already existing.

]]>https://forum.qt.io/post/501466https://forum.qt.io/post/501466Wed, 26 Dec 2018 06:28:01 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 06:20:50 GMT]]>@reonZ
I suggest you blow away your build folder, re-run qmake and rebuild the project to see if things get better.

]]>https://forum.qt.io/post/501464https://forum.qt.io/post/501464Wed, 26 Dec 2018 06:20:50 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 05:23:34 GMT]]>@KazuoAsano

Alright thanks for answering, i am posting a series of screenshot here:

Kits
Qt Versions
Qt Version (rest)
Compilers

What i don't understand is that minutes before everything was working fine, i had used "build" and "run" at least a dozen of times already at that point, and out of nowhere everything broke.

If i create a new project, here is what i get:
error

And if i try to build, i get lists of errors, warnings etc.:
build

]]>https://forum.qt.io/post/501459https://forum.qt.io/post/501459Wed, 26 Dec 2018 05:23:34 GMT<![CDATA[Reply to My Qt creator broke ? on Wed, 26 Dec 2018 05:06:36 GMT]]>I will be guessed from your comment, it may be something wrong with QtCreator's setting.
The kit's configuration perhaps may be broken.
If you possible to get additional information on the below screenshot, I and a community member may be able to give advice.

Screen transition : in menu bar "Tools" -> "Options..."
-> "Kits" of left Options Tab ：

Additional information screenshot

  • Kits tab
  • Qt Versions
  • Compilers
]]>https://forum.qt.io/post/501458https://forum.qt.io/post/501458Wed, 26 Dec 2018 05:06:36 GMT