@@ -216,8 +216,10 @@ static char *doubles2str(double *dp, int count, const char *sep)

     ap[0] = '\0';

     for (i = 0; i < count; i++) {

         unsigned l = snprintf(ap, component_len, "%f%s", dp[i], sep);

-        if(l >= component_len)

+        if(l >= component_len) {

+            av_free(ap0);

             return NULL;

+        }

         ap += l;

     }

     ap0[strlen(ap0) - strlen(sep)] = '\0';