https://bz.apache.org/bugzilla/show_bug.cgi?id=63151
Bug ID: 63151
Summary: NPE in UnicodeString.swapFontUse on invoking
HSSFOptimiser.optimiseFonts
Product: POI
Version: 4.0.0-FINAL
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: HSSF
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 36428
--> https://bz.apache.org/bugzilla/attachment.cgi?id=36428&action=edit
A test case to reproduce the issue
Please find a reproducer in attachment.
This is with Java 11 and POI 4.0.1.
The stack trace is:
Exception in thread "main" java.lang.NullPointerException
at
org.apache.poi.hssf.record.common.UnicodeString.swapFontUse(UnicodeString.java:676)
at
org.apache.poi.hssf.usermodel.HSSFOptimiser.optimiseFonts(HSSFOptimiser.java:155)
at ...
The problem is fairly obvious: the line loops over the elements of
field_4_format_runs without doing a null-check on it first.
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