fix invalid free of duplocale object when malloc has been replaced

[musl] / src / locale / duplocale.c

#include <stdlib.h>
#include <string.h>
#include "locale_impl.h"
#include "libc.h"

#define malloc __libc_malloc
#define calloc undef
#define realloc undef
#define free undef

locale_t __duplocale(locale_t old)
{
        locale_t new = malloc(sizeof *new);
        if (!new) return 0;
        if (old == LC_GLOBAL_LOCALE) old = &libc.global_locale;
        *new = *old;
        return new;
}

weak_alias(__duplocale, duplocale);