Here the first answer says (with some quotations) that it depends on, if the variable could be declared as register or not. https://stackoverflow.com/questions

Here the first answer says (with some quotations) that it depends on, if the variable could be declared as register or not. https://stackoverflow.com/questions/11962457/why-is-using-an-uninitialized-variable-undefined-behavior https://stackoverflow.com/questions/11962457/why-is-using-an... edit: i recognised that it does not count as the original example is about an array element...