check for negative index

AprilRobotics · Feb 5, 2024 · cd5360b · cd5360b
1 parent 359a984
commit cd5360b
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/apriltag.c b/apriltag.c
@@ -445,6 +445,8 @@ static matd_t* homography_compute2(double c[4][4]) {
             }
         }
 
+        assert(max_val_idx != -1);
+
         if (max_val < epsilon) {
             debug_print("WRN: Matrix is singular.\n");
             return NULL;