Summary: std.signals should not use 'length' stealth keyword in
Around line 182 this line appears in std.signals:
slots[slots_idx + 1 .. length] = null;
This should be changed to:
slots[slots_idx + 1 .. $] = null;
Or it will fail to compile when Signal is mixed into any class that defines a
Oh, and that usage of 'length' should be killed entirely because it's just a
bad idea, as has been discussed before.