OpenPNE 3

はじめまして。dfというものです。
Arch Linux上でOpenPNE3.8.18を動かしておりました。
先日Arch LinuxのアップデートによりPHP7がリリースされ、
https://www.archlinux.org/news/php-70-packages-released/
https://www.archlinuxjp.org/news/php-70-packages-released/
アップデート後、OpenPNEがエラーを吐くようになりました。

Web上のエラー
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ご迷惑をおかけいたしますが、しばらく時間を空けて再度アクセスしてください。

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Apache 2.4.18 のエラーログ
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[Mon Jan 25 00:47:26.189896 2016] [:error] [pid 426] [client *] Unknown record property / related component "Array" on "SnsTerm"
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$ ./symfony doctrine:build-model したときのログ
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[*@* OpenPNE3]$ ./symfony doctrine:build-model
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/modules/xcache.so' - /usr/lib/php/modules/xcache.so: undefined symbol: zval_used_for_init in Unknown on line 0
PHP Warning:  ob_start(): function '' not found or invalid function name in /opt/OpenPNE3/lib/vendor/symfony/lib/config/sfApplicationConfiguration.class.php on line 155

Warning: ob_start(): function '' not found or invalid function name in /opt/OpenPNE3/lib/vendor/symfony/lib/config/sfApplicationConfiguration.class.php on line 155
PHP Notice:  ob_start(): failed to create buffer in /opt/OpenPNE3/lib/vendor/symfony/lib/config/sfApplicationConfiguration.class.php on line 155

Notice: ob_start(): failed to create buffer in /opt/OpenPNE3/lib/vendor/symfony/lib/config/sfApplicationConfiguration.class.php on line 155
>> doctrine  generating model classes
>> file+     /tmp/doctrine_schema_51194.yml
PHP Warning:  file_put_contents(/opt/OpenPNE3/lib/model/doctrine/base/BaseMember.class.php): failed to open stream: Permission denied in /opt/OpenPNE3/lib/vendor/symfony/lib/plugins/sfDoctrinePlugin/lib/vendor/doctrine/Doctrine/Import/Builder.php on line 1287

Warning: file_put_contents(/opt/OpenPNE3/lib/model/doctrine/base/BaseMember.class.php): failed to open stream: Permission denied in /opt/OpenPNE3/lib/vendor/symfony/lib/plugins/sfDoctrinePlugin/lib/vendor/doctrine/Doctrine/Import/Builder.php on line 1287

  Couldn't write file /opt/OpenPNE3/lib/model/doctrine/base/BaseMember.class.php

以上です。初めての報告ですので不足している情報などあればおっしゃって下さい。それでは。