glib g_array_append_val() acting strange

Question

I have this very simple piece of code. I declare a glib array of doubles in C. Then I fill it using the g_array_append_val() function and, lastly, I print out the array content. The printed out version doesn't show the array items to be 0.0, 1.0, 2.0,..9.0 as I would expect. What could be wrong with this? Any ideas?

GArray *data;
data = g_array_new(FALSE, FALSE, sizeof(double));
int i;
for(i = 0; i < 10; i++) {
    double d =  (double)i;
    g_array_append_val(data, d);
}
for(i = 0; i < 10; i++)
    printf("%f ", g_array_index(data, double, i));

free(data);

The output is here:

0.000000 1.000000 2.000000 3.000000 4.000000 5.000000 0.000000 0.000000 0.000000 0.000000

I even looked up the test suite for the glib library and saw them doing it this exact way. This baffles me.

Answer 1

The user nemequ sent me in the right direction. I found out that in another function call, I was releasing the data GArray using the free(data); call, which is not good. GArrays are supposed to be released using g_array_free(data, TRUE); That was my problem. The memory got corrupted.