It means that bitwise operators should only be used on unsigned integers, otherwise you risk accidentally changing the sign of your result.

@angristan Que en gros tu utilises une opération bit à bit avec quelque chose qui peut être potentiellement négatif.

@angristan Tu utilises une variable signé et il préfère des octets tout cru.

@angristan I think that it's just warning you about the use of operations at bit's level using signed integers, this might cause error and I believe it wants you to use unsigned ints

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