*** This bug is a duplicate of bug 1889851 ***
https://bugs.launchpad.net/bugs/1889851
from this answer https://stackoverflow.com/a/62520135/1548052, this "solved"
the issue for me:
LD_PRELOAD=/lib/x86_64-linux-gnu/libstdc++.so.6 python3 …
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The problem with Alex's PPA is that it doesn't contain qtcreator-plugin-cmake
version 3.1. Therefore, I can't upgrade Qt Creator.
This bug is quite annoying!
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Bugs, which is subscribed to Ubuntu.
I have this problem as soon as I checkout a different branch in a project.
The problem also occured with release 3.1 downloaded from Qt website.
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https://bugs.launchpad.net/bugs/1299441
