NullPointerException and after redeploying TagLib used in Freemarker

• Type: Bug
• Status: Open
• Resolution: Unresolved
• Affects Version/s: 7.4.1 CE GA2
• Fix Version/s: None
• Component/s: Core Infrastructure
• Labels: None

Taglib module built in a liferay-workspace project with  liferay 7.4-ga2, based on "map-taglib", super simple. When I do the deploy for the first time, everything is ok.

But when I do a re-deploy I got this error (only happens if the taglib is used in theme or WDT. If the taglib is used in a JSP the error doesn't happens):

Caused by: java.lang.NullPointerException
 at javax.servlet.jsp.PageContext.getErrorData(PageContext.java:556) ~[jsp-api.jar:2.3.FR]
 at com.liferay.taglib.servlet.PageContextWrapper.getErrorData(PageContextWrapper.java:97) ~[util-taglib.jar:?]
 at org.apache.jsp.dynamic_005finclude.text_005fhtml_jsp._jspService(text_005fhtml_jsp.java:92) ~[?:?]
 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111) ~[jasper.jar:9.0.43]
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[servlet-api.jar:4.0.FR]
 at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411) ~[jasper.jar:9.0.43]
 at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473) ~[jasper.jar:9.0.43]
 at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377) ~[jasper.jar:9.0.43]
 

PS.: Tested the same taglib in a Liferay 7.3 version and the problem doesn't happens. Only in Liferay CE 7.4-GA2

PS: Full stack trace attached*