From e8b46f5f3a9c42eba4f264de8d9c51ccde806ee2 Mon Sep 17 00:00:00 2001
From: Markus Metz <markus.metz.giswork@gmail.com>
Date: Thu, 23 Apr 2026 19:16:47 +0200
Subject: [PATCH] v.overlay: do not use invalid centroids

---
 vector/v.overlay/area_area.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/vector/v.overlay/area_area.c b/vector/v.overlay/area_area.c
index 7c986643276..e8ae6fb3ed5 100644
--- a/vector/v.overlay/area_area.c
+++ b/vector/v.overlay/area_area.c
@@ -205,6 +205,8 @@ int area_area(struct Map_info *In, int *field, struct Map_info *Tmp,
     Vect_spatial_index_init(&si, 0);
     ncentr = nareas;
     for (ocentr = 1; ocentr <= ncentr; ocentr++) {
+        if (!Centr[ocentr].valid)
+            continue;
         box.N = box.S = Centr[ocentr].y;
         box.E = box.W = Centr[ocentr].x;
         box.T = box.B = 0;
@@ -311,6 +313,9 @@ int area_area(struct Map_info *In, int *field, struct Map_info *Tmp,
 
         G_percent(area, nareas, 1);
 
+        if (!Centr[area].valid)
+            continue;
+
         /* check the condition */
         switch (operator) {
         case OP_AND: