Handle NPE when filter is not run by returning empty Set

dita-ot / dita-ot

DITA Open Toolkit — the open-source publishing engine for content authored in the Darwin Information Typing Architecture.

https://www.dita-ot.org

Apache License 2.0

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Handle NPE when filter is not run by returning empty Set #4449

Closed jelovirt closed 1 month ago

jelovirt commented 2 months ago

Description

Handle NPE when filter is not run by returning empty Set.

Motivation and Context

A regression bug that occurs when the map refers to a topic that doesn't exist and some topic in the set contains a key reference. The error occurs regardless of the processing mode.

Fixes #4454

How Has This Been Tested?

Existing tests.

Type of Changes

Bug fix (non-breaking change which fixes an issue)

Documentation and Compatibility

No user facing change.