[FREEMARKER-165] NullPointerException (at freemarker.core.BlockAssignment.accept:62)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.28
• Fix Version/s: 2.3.31
• Component/s: engine
• Environment: Windows 10; fmpp / http://fmpp.sourceforge.net/ (v0.9.16 per March, 10th 2020)
• Assignee: Unassigned
• Reporter: Torsten Rendelmann
• Created: 26/Nov/20 09:57
• Updated: 17/Feb/21 21:17
• Resolved: 28/Nov/20 14:19

Description

Have a xxx.ftl with only this content:
<#assign VersionMajor in doc>1</#assign>
 
Try to processing this with fmpp results in this error message:

• Executing: xxx.ftl
  !!! FAILED

>>> ABORTED! <<<

0 executed + 0 rendered + 0 copied = 0 successfully processed
1 failed, 0 warning(s)
Time elapsed: 0.077 seconds

Error when processing this file: xxx.ftl
java.lang.NullPointerException (at freemarker.core.BlockAssignment.accept:62)

The reason is the assignment of the variable, expected to be defined in another (not yet included template). Remove the text marked as red and it succeeds.

Expected: not an NPE, but a useful error message pointing to the problem.