From 8ac431a7f1b92396047f55fd0ba2648012d0ef4c Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Tue, 30 Apr 2019 03:34:38 +0200
Subject: [PATCH] 3d:: fixed a crashbug

---
 3d-models.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/3d-models.cpp b/3d-models.cpp
index e157cd81..15c20f0b 100644
--- a/3d-models.cpp
+++ b/3d-models.cpp
@@ -585,7 +585,7 @@ void make_revolution_cut(hpcshape &sh, int each = 180, ld push = 0, ld width = 9
     stillin[i] = false;
     }
   
-  for(int i=n; i>=0; i--) if(!stillin[i] && !stillin[nextid[i]]) nextid[i] = nextid[nextid[i]];
+  for(int i=n-1; i>=0; i--) if(!stillin[i] && !stillin[nextid[i]]) nextid[i] = nextid[nextid[i]];
   for(int i=0; i<n; i++) if(!stillin[i] && !stillin[lastid[i]]) lastid[i] = lastid[lastid[i]];
 
   for(int i=0; i<n; i++) {