question about memory management

[guan-das-jounior]

Hello,

I'm a little confused about memory management in Janet's C API. I'm trying to evaluate Janet expressions in a loop and print the results, but I'm running into issues with the string returned by janet_to_string().

Issue:

• If I call janet_free(buff), the program crashes after the first iteration
• If I don't call janet_free(buff), the program leaks memory on every iteration

#include "janet.h"
#include <stdio.h>

int main(int argc, const char *argv[]) {
    janet_init();

    JanetTable *env = janet_core_env(NULL);
    Janet out;

    while (1)
    {
        int status = janet_dostring(env, "(+ 1 1)", "main", &out);
        char *buff = janet_to_string(out);
        printf("result is %s\n", buff);
        janet_free(buff); // <--- CRASHES HERE
    }

    janet_deinit();
    return 0;
}