I used Geany 1.37 om Ubuntu 20.04, when I compiled such code(Line 34), there was different prompts between GUI and CLI:
Inside GUI, there was a red wave line under Line 34 ( int v2[10]; ) , and I heard an alert from PC: /home/mianqi/Pictures/Screenshot from 2022-01-26 09-22-15.png
While, inside CLI, it was OK: /home/mianqi/Pictures/Screenshot from 2022-01-26 09-23-02.png