brianchandotcom/liferay-plugins — pull request #2389 by dsigno (2013-11-29 07:53:56+00:00)
Title: https://issues.liferay.com/browse/LPS-42677

According to this article:

https://www.liferay.com/it/web/raymond.auge/blog/-/blogs/liferay-6-2-targets-java-6-and-ant-1-8

Liferay 6.2 should requires Ant 1.8 or higher.