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D:\vcpkg\toolsrc\include\catch2\catch.hpp(11285): warning C6330: 'char' passed as _Param_(1) when 'unsigned char' is required in call to 'isspace'. D:\vcpkg\toolsrc\include\catch2\catch.hpp(11288): warning C6330: 'char' passed as _Param_(1) when 'unsigned char' is required in call to 'isspace'. ISO/IEC 9899:2011: "7.4 Character handling <ctype.h>"/1 [...] In all cases the argument is an int, the value of which shall be representable as an unsigned char or shall equal the value of the macro EOF. If the argument has any other value, the behavior is undefined. This means if isspace was passed a character like ñ it could corrupt memory without the static_cast to treat it as a positive value after integral promotion (and C libraries commonly use the int index supplied as a key into a table which result in out of bounds access if the resulting int is negative). |
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