The only situation in which that will happen is a function going from returning a value to returning a value and an error and you were actually getting & using the value.
If a function starts returning more variable errors Go likely won’t tell you (though in fairness that’s a pretty common issue).
If a function was not returning anything or you did not care for the value it returned, it adding an error will be a completely invisible event.
If a function starts returning more variable errors Go likely won’t tell you (though in fairness that’s a pretty common issue).
If a function was not returning anything or you did not care for the value it returned, it adding an error will be a completely invisible event.