Merge branch '5.9' into dev

Conflicts:
	.qmake.conf
	src/core/qscene.cpp
	src/plugins/sceneparsers/gltf/gltfimporter.cpp
	src/plugins/sceneparsers/gltfexport/gltfexporter.cpp
	src/render/texture/gltexture.cpp

Change-Id: I7bde0fc0177eae252fef01cc43725fcf69c13a80

1 files changed, 1 insertions, 1 deletions

diff --git a/src/plugins/sceneparsers/gltf/gltfimporter.cpp b/src/plugins/sceneparsers/gltf/gltfimporter.cpp
index 6a10381df..78e230969 100644
--- a/src/plugins/sceneparsers/gltf/gltfimporter.cpp
+++ b/src/plugins/sceneparsers/gltf/gltfimporter.cpp
@@ -1546,7 +1546,7 @@ void GLTFImporter::processJSONExtensions(const QString &id, const QJsonObject &j
     // level GLTF item.
     if (id == KEY_COMMON_MAT) {
         const auto lights = jsonObject.value(KEY_LIGHTS).toObject();
-        for (auto lightKey : lights.keys()) {
+        for (const auto &lightKey : lights.keys()) {
             const auto light = lights.value(lightKey).toObject();
             auto lightType = light.value(KEY_TYPE).toString();
             const auto lightValues = light.value(lightType).toObject();