Avoid memory leak by allowing to release Style objects (bis)

PowerKiKi · PowerKiKi · commit e5185eab0c16 · 2021-05-16T13:54:13.000+09:00
Fixes #2092
diff --git a/src/PhpSpreadsheet/Spreadsheet.php b/src/PhpSpreadsheet/Spreadsheet.php
@@ -506,6 +506,7 @@ public function __destruct()
         $this->disconnectWorksheets();
         $this->calculationEngine = null;
         $this->cellXfCollection = [];
+        $this->cellStyleXfCollection = [];
     }
 
     /**

Original file line number	Diff line number	Diff line change
`@@ -506,6 +506,7 @@ public function __destruct()`
`506`	`506`	`$this->disconnectWorksheets();`
`507`	`507`	`$this->calculationEngine = null;`
`508`	`508`	`$this->cellXfCollection = [];`
	`509`	`+ $this->cellStyleXfCollection = [];`
`509`	`510`	`}`
`510`	`511`
`511`	`512`	`/**`