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Non-nullable field '_children' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Possible null reference argument for parameter 'func' in 'void Source.SetCallback(SourceHandle source, SourceFunc func, IntPtr data, DestroyNotify notify)'.

Possible null reference argument for parameter 'notify' in 'void Source.SetCallback(SourceHandle source, SourceFunc func, IntPtr data, DestroyNotify notify)'.

Possible null reference argument for parameter 'function' in 'uint Functions.ChildWatchAdd(int priority, Pid pid, ChildWatchFunc function, IntPtr data, DestroyNotify notify)'.

Possible null reference argument for parameter 'notify' in 'uint Functions.ChildWatchAdd(int priority, Pid pid, ChildWatchFunc function, IntPtr data, DestroyNotify notify)'.

Possible null reference argument for parameter 'managed' in 'DuplicateFuncCallHandler.DuplicateFuncCallHandler(DuplicateFunc managed)'.

Possible null reference argument for parameter 'function' in 'uint Functions.IdleAdd(int priority, SourceFunc function, IntPtr data, DestroyNotify notify)'.

Possible null reference argument for parameter 'notify' in 'uint Functions.IdleAdd(int priority, SourceFunc function, IntPtr data, DestroyNotify notify)'.

Possible null reference argument for parameter 'func' in 'uint Functions.IoAddWatch(IOChannelHandle channel, int priority, IOCondition condition, IOFunc func, IntPtr userData, DestroyNotify notify)'.

Possible null reference argument for parameter 'notify' in 'uint Functions.IoAddWatch(IOChannelHandle channel, int priority, IOCondition condition, IOFunc func, IntPtr userData, DestroyNotify notify)'.

Unreachable code detected