q_slots
C++ Qt Signals and Slots
Since display() is part of the class's interface with the rest of the program, the slot is public. ... The public API of Qt-based libraries should use the keywords Q_SIGNALS and Q_SLOTS instead of signals and slots.
Signals & Slots | Qt Core | Qt 6.9.0
The public API of Qt-based libraries should use the keywords Q_SIGNALS and Q_SLOTS instead of signals and slots. Otherwise it is hard to use such a library in a project that defines QT_NO_KEYWORDS.
Started initial process 69823 from gamemoderun /home ...
PS: The slot and the signal have been properly declared in header files using the Q_SIGNALS and Q_SLOTS keywords, with the correct argument (aStruct).