Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/zendframework/zend-stdlib/src/ErrorHandler.php

@@ -0,0 +1,115 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Stdlib;
+
+use ErrorException;
+
+/**
+ * ErrorHandler that can be used to catch internal PHP errors
+ * and convert to an ErrorException instance.
+ */
+abstract class ErrorHandler
+{
+    /**
+     * Active stack
+     *
+     * @var array
+     */
+    protected static $stack = [];
+
+    /**
+     * Check if this error handler is active
+     *
+     * @return bool
+     */
+    public static function started()
+    {
+        return (bool) static::getNestedLevel();
+    }
+
+    /**
+     * Get the current nested level
+     *
+     * @return int
+     */
+    public static function getNestedLevel()
+    {
+        return count(static::$stack);
+    }
+
+    /**
+     * Starting the error handler
+     *
+     * @param int $errorLevel
+     */
+    public static function start($errorLevel = \E_WARNING)
+    {
+        if (!static::$stack) {
+            set_error_handler([get_called_class(), 'addError'], $errorLevel);
+        }
+
+        static::$stack[] = null;
+    }
+
+    /**
+     * Stopping the error handler
+     *
+     * @param  bool $throw Throw the ErrorException if any
+     * @return null|ErrorException
+     * @throws ErrorException If an error has been catched and $throw is true
+     */
+    public static function stop($throw = false)
+    {
+        $errorException = null;
+
+        if (static::$stack) {
+            $errorException = array_pop(static::$stack);
+
+            if (!static::$stack) {
+                restore_error_handler();
+            }
+
+            if ($errorException && $throw) {
+                throw $errorException;
+            }
+        }
+
+        return $errorException;
+    }
+
+    /**
+     * Stop all active handler
+     *
+     * @return void
+     */
+    public static function clean()
+    {
+        if (static::$stack) {
+            restore_error_handler();
+        }
+
+        static::$stack = [];
+    }
+
+    /**
+     * Add an error to the stack
+     *
+     * @param int    $errno
+     * @param string $errstr
+     * @param string $errfile
+     * @param int    $errline
+     * @return void
+     */
+    public static function addError($errno, $errstr = '', $errfile = '', $errline = 0)
+    {
+        $stack = & static::$stack[count(static::$stack) - 1];
+        $stack = new ErrorException($errstr, 0, $errno, $errfile, $errline, $stack);
+    }
+}