QtCreator crashes when cleaning build dir

Hi, I can make my QtCreator crash every time I click Build -> Clean (first one)

I works fine for some projects, maybe cmake ones are fine, but this one is qmake with Qt 5.12 (which I don't think matters), both Desktop and Android Kits make it crash.
Here is a backtrace but it isn't very useful, I may need to compile by source.

Thread 1 "qtcreator" received signal SIGSEGV, Segmentation fault.
0x00007fffa46301b0 in ProjectExplorer::Target::activeBuildConfiguration() const () from /home/daniel/code/Qt/Tools/Q
tCreator/lib/qtcreator/plugins/libProjectExplorer.so                                                                 
(gdb) bt
#0  0x00007fffa46301b0 in ProjectExplorer::Target::activeBuildConfiguration() const ()
  from /home/daniel/code/Qt/Tools/QtCreator/lib/qtcreator/plugins/libProjectExplorer.so
#1  0x00007fffa439b570 in ?? ()
  from /home/daniel/code/Qt/Tools/QtCreator/lib/qtcreator/plugins/libProjectExplorer.so
#2  0x00007fffa43a0dd9 in ?? ()
  from /home/daniel/code/Qt/Tools/QtCreator/lib/qtcreator/plugins/libProjectExplorer.so
#3  0x00007fffa43a2c28 in ProjectExplorer::BuildManager::cleanProjects(QList<ProjectExplorer::Project*> const&, Proj
ectExplorer::ConfigSelection) ()                                                                                     
  from /home/daniel/code/Qt/Tools/QtCreator/lib/qtcreator/plugins/libProjectExplorer.so
#4  0x00007fffa45645da in ?? ()
  from /home/daniel/code/Qt/Tools/QtCreator/lib/qtcreator/plugins/libProjectExplorer.so
#5  0x00007ffff5f97a22 in ?? () from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Core.so.6
#6  0x00007ffff6d891c2 in QAction::triggered(bool) ()
  from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Gui.so.6
#7  0x00007ffff5f97a22 in ?? () from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Core.so.6
#8  0x00007ffff6d891c2 in QAction::triggered(bool) ()
  from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Gui.so.6
#9  0x00007ffff6d8bf79 in QAction::activate(QAction::ActionEvent) ()
  from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Gui.so.6
#10 0x00007ffff7534e92 in ?? () from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Widgets.so.6
#11 0x00007ffff753c839 in ?? () from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Widgets.so.6
#12 0x00007ffff73cc4d8 in QWidget::event(QEvent*) ()
  from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Widgets.so.6
#13 0x00007ffff7376f62 in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
  from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Widgets.so.6
#14 0x00007ffff737f8d8 in QApplication::notify(QObject*, QEvent*) ()
  from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Widgets.so.6
#15 0x00007ffff5f3928a in QCoreApplication::notifyInternal2(QObject*, QEvent*) ()
  from /home/daniel/code/Qt/Tools/QtCreator/bin/../lib/Qt/lib/libQt6Core.so.6