> Use of the numeric conversion specifiers produces Undefined Behavior for invalid input. See C11 7.21.6.2/10 ⟨https://port70.net/%7Ensz/c/c11/n1570.html#7.21.6.2p10⟩. This is a bug in the ISO C standard, and not an inherent design issue with the API. However, current implementations are not safe from that bug, so it is not recommended to use them. Instead, programs should use functions such as strtol(3) to parse numeric input. This manual page deprecates use of the numeric conversion specifiers until they are fixed by ISO C.
> Use of the numeric conversion specifiers produces Undefined Behavior for invalid input. See C11 7.21.6.2/10 ⟨https://port70.net/%7Ensz/c/c11/n1570.html#7.21.6.2p10⟩. This is a bug in the ISO C standard, and not an inherent design issue with the API. However, current implementations are not safe from that bug, so it is not recommended to use them. Instead, programs should use functions such as strtol(3) to parse numeric input. This manual page deprecates use of the numeric conversion specifiers until they are fixed by ISO C.