From 3fc107ad5426ccf73566d562cf643c9e94e27d5b Mon Sep 17 00:00:00 2001
From: Lewis Voncken <lewis@experius.nl>
Date: Sat, 6 Oct 2018 18:12:27 +0200
Subject: [PATCH 1/2] [BACKPORT] type casted $qty to float in
 \Magento\Catalog\Model\Product::setQty()

---
 app/code/Magento/Catalog/Model/Product.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/app/code/Magento/Catalog/Model/Product.php b/app/code/Magento/Catalog/Model/Product.php
index e4dacf275fc9b..b5e0a2c0f48b6 100644
--- a/app/code/Magento/Catalog/Model/Product.php
+++ b/app/code/Magento/Catalog/Model/Product.php
@@ -972,7 +972,7 @@ public function afterSave()
     public function setQty($qty)
     {
         if ($this->getData('qty') != $qty) {
-            $this->setData('qty', $qty);
+            $this->setData('qty', (float)$qty);
             $this->reloadPriceInfo();
         }
         return $this;
@@ -985,7 +985,7 @@ public function setQty($qty)
      */
     public function getQty()
     {
-        return $this->getData('qty');
+        return (float)$this->getData('qty');
     }
 
     /**

From fa529366822a4e049ddcab820212af24ee931c2b Mon Sep 17 00:00:00 2001
From: Oleksii Korshenko <korshenk@adobe.com>
Date: Fri, 19 Oct 2018 14:02:30 -0500
Subject: [PATCH 2/2] Issue magento/magento2#18094: Should getQty() return
 int/float or string

 - remove typecasting from the setter
---
 app/code/Magento/Catalog/Model/Product.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/code/Magento/Catalog/Model/Product.php b/app/code/Magento/Catalog/Model/Product.php
index b5e0a2c0f48b6..8a9233f176c61 100644
--- a/app/code/Magento/Catalog/Model/Product.php
+++ b/app/code/Magento/Catalog/Model/Product.php
@@ -972,7 +972,7 @@ public function afterSave()
     public function setQty($qty)
     {
         if ($this->getData('qty') != $qty) {
-            $this->setData('qty', (float)$qty);
+            $this->setData('qty', $qty);
             $this->reloadPriceInfo();
         }
         return $this;