From 3417b9df09248da91431dba99af2b3b2aa6257c8 Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Thu, 13 Sep 2018 20:23:58 +0200
Subject: [PATCH] egg: work around compiler bug in Visual Studio 2017

Fixes #379
---
 panda/src/egg/eggVertexPool.cxx | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/panda/src/egg/eggVertexPool.cxx b/panda/src/egg/eggVertexPool.cxx
index 8fa3b5e637..6f2768599e 100644
--- a/panda/src/egg/eggVertexPool.cxx
+++ b/panda/src/egg/eggVertexPool.cxx
@@ -677,7 +677,15 @@ transform(const LMatrix4d &mat) {
     typedef pvector<EggVertex *> Verts;
     Verts verts;
     verts.reserve(size());
+
+    // Work around MSVC 2017 compiler bug, see GitHub issue #379
+#ifdef _MSC_VER
+    for (const IndexVertices::value_type &v : _index_vertices) {
+      verts.push_back(v.second);
+    }
+#else
     std::copy(begin(), end(), std::back_inserter(verts));
+#endif
 
     Verts::const_iterator vi;
     for (vi = verts.begin(); vi != verts.end(); ++vi) {