Qt Creator fresh install Ubuntu 18.04, will open and close

[biaspoint]

Did a fresh re-install of 18.04 and then installed Qt with:
sudo apt-get install build-essential
sudo apt-get install qtcreator
sudo apt-get install qt5-default

now when I launch it closes within seconds, and when launched from the terminal:

SOFT ASSERT: "!tcd.tcs.isEmpty()" in file /build/qtcreator-4mibqh/qtcreator-4.5.2/src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp, line 336
SOFT ASSERT: "k" in file /build/qtcreator-4mibqh/qtcreator-4.5.2/src/plugins/projectexplorer/targetsettingspanel.cpp, line 315
SOFT ASSERT: "k" in file /build/qtcreator-4mibqh/qtcreator-4.5.2/src/plugins/projectexplorer/targetsettingspanel.cpp, line 315
SOFT ASSERT: "k" in file /build/qtcreator-4mibqh/qtcreator-4.5.2/src/plugins/projectexplorer/targetsettingspanel.cpp, line 315
SOFT ASSERT: "k" in file /build/qtcreator-4mibqh/qtcreator-4.5.2/src/plugins/projectexplorer/targetsettingspanel.cpp, line 315
SOFT ASSERT: "k" in file /build/qtcreator-4mibqh/qtcreator-4.5.2/src/plugins/projectexplorer/targetsettingspanel.cpp, line 315
SOFT ASSERT: "k" in file /build/qtcreator-4mibqh/qtcreator-4.5.2/src/plugins/projectexplorer/targetsettingspanel.cpp, line 315
SOFT ASSERT: "!tcd.tcs.isEmpty()" in file /build/qtcreator-4mibqh/qtcreator-4.5.2/src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp, line 336
Segmentation fault (core dumped)

Interestingly I did not format my home directory, and the first time Qt Creator launched I saw a few of my old workspaces written in red, like they were still being referenced even though everything should have been new?

[biaspoint]

@biaspoint
So I decided to remove and start over. After looking at the packages that are installed:
dpkg -l | grep qt | awk '{print $2}' | xargs -n1 echo

only included items that "looked" like Qt, I used the following to get rid of all the Qt items:
sudo apt-get --purge remove 'qt.*'

Note: that can take a lot of things out that you do not intend... use carefully!

I then retried using the same steps above, however this time I read the reports and added:

sudo apt autoremove

after the

sudo apt-get install build-essential

step.

Now when I launch I get a "Cannot overwrite file /home/.../.config/QTProject/qtcreator/toolchains.xml: Permission denied."

I then removed any "QT" folder in that path.

and Voila... working QT!

[JonB]

@biaspoint
I am pleased you have your situation sorted.

Purely OOI, because I like shell scripting, why did you bother to put the xargs into your command when
dpkg -l | grep qt | awk '{print $2}'
would deliver the same result? :) | xargs -n1 echo is a bit of a no-op?