0.9.8 on linux:
#include <stdio.h>
#include <stdlib.h>
#include <openssl/bn.h>
void error(int line) {
fprintf(stderr, "Error on line %d\n", line);
exit(1);
}
int main(void) {
BIGNUM m;
BN_init(&m);
if (!BN_set_word(&m, 5)) error(__LINE__);
BN_mod_word(&m, 0L);
BN_free(&m);
return 0;
}
=====================
Gives:
Floating point exception (core dumped)
Reason: unlike in BN_div_word, in BN_mod_word w is not checked for being 0
PS:
these functions are really bad in that you can't distinguish
between failure and a real 0 result. Maybe they should be
returning (BN_ULONG) -1, since that value is impossible as normal output
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