[FOP-1615] NPE in InlineStackingLayoutManager when hyphenate without break opportunity

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.95
• Component/s: layout/inline
• Environment: Operating System: Linux; Platform: PC
• External issue ID: 46386
• Assignee: Unassigned
• Reporter: Carsten Metzler
• Created: 12/Dec/08 06:27
• Updated: 17/Mar/17 10:07

Description

In the org.apache.fop.layoutmgr.inline.InlineStackingLayoutManager an NullPointerException is thrown in the "applyChanges"-method, when the variables prevLM AND currLM both are null.

line 333-338:
currLM = (InlineLevelLayoutManager) oldElement.getLayoutManager();

// initialize prevLM
if (prevLM == null)

{ prevLM = currLM; }

The getLayoutManager-method of the ListElement-class returns null when no position is set, so currLM is null. If prevLM is null, too, prevLM is set to currLM - so both are null. In the following code the applyChanges-method is called on prevLM without null-check.

As workaround I inserted the following code after line 338:

if(prevLM == null && currLM == null)

{ continue; }