fix wrong :

GraysonAstral · GraysonAstral · commit 68b06de07437 · 2020-02-10T22:00:00.000+08:00
diff --git a/app/code/Magento/Bundle/Helper/Data.php b/app/code/Magento/Bundle/Helper/Data.php
@@ -38,6 +38,6 @@ public function getAllowedSelectionTypes()
     {
         $configData = $this->config->getType(\Magento\Catalog\Model\Product\Type::TYPE_BUNDLE);
 
-        return $configData['allowed_selection_types'] ?? : [];
+        return $configData['allowed_selection_types'] ?? [];
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -38,6 +38,6 @@ public function getAllowedSelectionTypes()`
`38`	`38`	`{`
`39`	`39`	`$configData = $this->config->getType(\Magento\Catalog\Model\Product\Type::TYPE_BUNDLE);`
`40`	`40`
`41`		`- return $configData['allowed_selection_types'] ?? : [];`
	`41`	`+ return $configData['allowed_selection_types'] ?? [];`
`42`	`42`	`}`
`43`	`43`	`}`