If you exit mixxx while the Developer Tools window is still open, this debug assertion triggers:
[...]
Warning [Main]: "[EffectRack1_EffectUnit4_Effect4]" "button_parameter8_type" QObject(0x0)
Warning [Main]: "[EqualizerRack1_[Channel4]_Effect1]" "parameter2_type" QObject(0x0)
Warning [Main]: "[Sampler10]" "hotcue_32_activate" QObject(0x0)
Warning [Main]: "[Sampler11]" "hotcue_22_gotoandplay" QObject(0x0)
Warning [Main]: "[PreviewDeck1]" "hotcue_29_position" QObject(0x0)
Warning [Main]: "[EffectRack1_EffectUnit2_Effect2]" "parameter2_set_zero" QObject(0x0)
Warning [Main]: "[EffectRack1_EffectUnit1_Effect1]" "parameter4_down" QObject(0x0)
Warning [Main]: "[QuickEffectRack1_[Channel2]_Effect1]" "parameter12_set_zero" QObject(0x0)
Warning [Main]: "[EffectRack1_EffectUnit3]" "group_[Microphone]_enable" QObject(0x0)
Warning [Main]: "[Channel4]" "hotcue_6_clear" QObject(0x0)
Warning [Main]: "[QuickEffectRack1_[Channel2]_Effect1]" "parameter11_set_one" QObject(0x0)
Warning [Main]: "[Sampler3]" "hotcue_11_color" QObject(0x0)
Warning [Main]: "[Sampler12]" "hotcue_14_clear" QObject(0x0)
Warning [Main]: "[Sampler13]" "hotcue_13_color" QObject(0x0)
Warning [Main]: "[EffectRack1_EffectUnit2_Effect1]" "parameter13_toggle" QObject(0x0)
Warning [Main]: "[EffectRack1_EffectUnit2_Effect2]" "parameter1_set_zero" QObject(0x0)
Warning [Main]: "[EffectRack1_EffectUnit2_Effect4]" "parameter11_set_default" QObject(0x0)
Warning [Main]: "[OutputEffectRack_[Master]_Effect1]" "parameter13_up" QObject(0x0)
Warning [Main]: "[Channel1]" "VuMeter_set_one" QObject(0x0)
Warning [Main]: "[EffectRack1_EffectUnit3_Effect1]" "parameter9_up_small" QObject(0x0)
Warning [Main]: "[Auxiliary1]" "VuMeter_set_minus_one" QObject(0x0)
Warning [Main]: "[EffectRack1_EffectUnit4_Effect1]" "parameter3_minus_toggle" QObject(0x0)
Warning [Main]: "[Sampler1]" "hotcue_24_gotoandstop" QObject(0x0)
Warning [Main]: "[Sampler12]" "hotcue_22_gotoandstop" QObject(0x0)
Warning [Main]: "[EffectRack1_EffectUnit1_Effect3]" "parameter3_set_zero" QObject(0x0)
Warning [Main]: "[EqualizerRack1_[Channel1]_Effect1]" "parameter9_set_one" QObject(0x0)
Warning [Main]: "[EqualizerRack1_[Channel2]_Effect1]" "parameter9_down_small" QObject(0x0)
Warning [Main]: "[Skin]" "show_key_controls_compact" QObject(0x0)
Warning [Main]: "[EffectRack1_EffectUnit2_Effect4]" "parameter13_toggle" QObject(0x0)
Warning [Main]: "[QuickEffectRack1_[Channel2]_Effect1]" "parameter1_set_zero" QObject(0x0)
DEBUG ASSERT: "!"Controls were leaked!"" in function void MixxxMainWindow::finalize() at /home/jan/Projects/mixxx/src/mixxx.cpp:874
Aborted (core dumped)
We should make sure to close the window when exiting mixxx before destroying the COs.
https:/