From 7d43c4e7ad6b83a23516b26b4aebf74f398c251b Mon Sep 17 00:00:00 2001
From: Paweł Redman <pawel.redman@gmail.com>
Date: Tue, 17 Oct 2017 23:13:04 +0200
Subject: Fix a bug in entity linking.

---
 src/world.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'src/world.cpp')

diff --git a/src/world.cpp b/src/world.cpp
index 06369f6..c18a7ab 100644
--- a/src/world.cpp
+++ b/src/world.cpp
@@ -192,7 +192,7 @@ void entity_t::link(world_t *world)
 
 	for (int64_t y = 0; y < (int64_t)ysecs; y++)
 	for (int64_t x = 0; x < (int64_t)xsecs; x++) {
-		sector_index_t index = sector_index_at(v2f_t(base[0] + x, base[1] + y));
+		sector_index_t index = base + sector_index_t(x, y);
 		sector_t *sector;
 
 		sector = world->get_sector(index);
@@ -202,8 +202,15 @@ void entity_t::link(world_t *world)
 
 void entity_t::unlink(void)
 {
-	for (sector_t *sector : parents)
+	for (sector_t *sector : parents) {
+		if (sector->ents.find(this) == sector->ents.end()) {
+			printf("entity_t::unlink: %p should belong to %p (%" PRIi64", %" PRIi64") but it doesn't\n",
+			       this, sector, sector->index[0], sector->index[1]);
+			continue;
+		}
+
 		sector->ents.erase(sector->ents.find(this));
+	}
 
 	parents.clear();
 	parent_world = nullptr;
-- 
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