From 49a7f863b8b96b0c50f33c1124d6d39b235b64ba Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Mon, 24 Jun 2019 22:59:34 +0000
Subject: [PATCH] Fix off-by-1 in Group::Remap.

This was introduced in bd84bc1a and caused crashes with:
  Assertion failed: hm.v != t->h.v.
---
 src/group.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/group.cpp b/src/group.cpp
index 5524814..5e7dc58 100644
--- a/src/group.cpp
+++ b/src/group.cpp
@@ -718,7 +718,7 @@ hEntity Group::Remap(hEntity in, int copyNumber) {
     auto it = remap.find({ in, copyNumber });
     if(it == remap.end()) {
         std::tie(it, std::ignore) =
-            remap.insert({ { in, copyNumber }, { (uint32_t)remap.size() } });
+            remap.insert({ { in, copyNumber }, { (uint32_t)remap.size() + 1 } });
     }
     return h.entity(it->second.v);
 }