simplify_arithmetic_expression - Division by 0 does not work

[avighnac]

Code:

#include <arithmetica.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
    char *answer = simplify_arithmetic_expression ("1/0", 0, 10);
    printf("%s\n", answer);
    free (answer);
    answer = simplify_arithmetic_expression ("1/0", 1, 0);
    printf("%s\n", answer);
    free (answer);
    answer = simplify_arithmetic_expression ("1/0", 2, 0);
    printf("%s\n", answer);
    free (answer);
    answer = simplify_arithmetic_expression ("1/0+2/0", 1, 0);
    printf("%s\n", answer);
    free (answer);
}

Output:

u+0
1/0
u + u/0
... apparently runs into some kind of infinite loop

Expected:

undefined
undefined
undefined
undefined