<gallery/> macro with no content produce a NullPointerException

Failed to converter content located in page with title [Test] and version [1032]
class org.xwiki.filter.FilterException: Failed to convert content page
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.convertToXWiki21(MediaWikiInputFilterStream.java:713)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.readPageRevision(MediaWikiInputFilterStream.java:635)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.readPage(MediaWikiInputFilterStream.java:486)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.readMediaWiki(MediaWikiInputFilterStream.java:385)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.read(MediaWikiInputFilterStream.java:373)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.read(MediaWikiInputFilterStream.java:342)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.read(MediaWikiInputFilterStream.java:84)
    at org.xwiki.filter.input.AbstractBeanInputFilterStream.read(AbstractBeanInputFilterStream.java:79)
    at org.xwiki.filter.internal.job.FilterStreamConverterJob.runInternal(FilterStreamConverterJob.java:97)
    at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:243)
    at org.xwiki.job.AbstractJob.run(AbstractJob.java:220)
    at org.xwiki.filter.script.internal.ScriptFilterStreamConverterJob.run(ScriptFilterStreamConverterJob.java:75)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: class java.lang.NullPointerException: null
    at java.base/java.io.StringReader.<init>(StringReader.java:50)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.GalleryEventGenerator.createContent(GalleryEventGenerator.java:39)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.MacroEventGenerator.getContent(MacroEventGenerator.java:88)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.MacroEventGenerator.traverse(MacroEventGenerator.java:110)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.EventConverter.traverse(EventConverter.java:421)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.EventConverter.traverse(EventConverter.java:389)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.EventConverter.traverse(EventConverter.java:367)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.EventConverter.traverse(EventConverter.java:356)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.EventConverter.traverse(EventConverter.java:374)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.WPTableBlockEventGenerator.traverse(WPTableBlockEventGenerator.java:83)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.WPTableBlockEventGenerator.traverse(WPTableBlockEventGenerator.java:59)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.WPTableBlockEventGenerator.traverse(WPTableBlockEventGenerator.java:46)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.EventConverter.traverse(EventConverter.java:421)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.EventConverter.traverse(EventConverter.java:389)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.EventConverter.traverse(EventConverter.java:367)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.EventConverter.traverse(EventConverter.java:356)
    at org.xwiki.contrib.mediawiki.syntax.internal.parser.converter.EventConverter.nodesToText(EventConverter.java:232)
    at info.bliki.wiki.model.AbstractWikiModel.render(AbstractWikiModel.java:1245)
    at org.xwiki.contrib.mediawiki.syntax.internal.input.MediaWikiSyntaxInputFilterStream.read(MediaWikiSyntaxInputFilterStream.java:104)
    at org.xwiki.contrib.mediawiki.syntax.internal.input.MediaWikiSyntaxInputFilterStream.read(MediaWikiSyntaxInputFilterStream.java:47)
    at org.xwiki.filter.input.AbstractBeanInputFilterStream.read(AbstractBeanInputFilterStream.java:79)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.convertToXWiki21(MediaWikiInputFilterStream.java:711)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.readPageRevision(MediaWikiInputFilterStream.java:635)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.readPage(MediaWikiInputFilterStream.java:486)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.readMediaWiki(MediaWikiInputFilterStream.java:385)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.read(MediaWikiInputFilterStream.java:373)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.read(MediaWikiInputFilterStream.java:342)
    at org.xwiki.contrib.mediawiki.xml.internal.input.MediaWikiInputFilterStream.read(MediaWikiInputFilterStream.java:84)
    at org.xwiki.filter.input.AbstractBeanInputFilterStream.read(AbstractBeanInputFilterStream.java:79)
    at org.xwiki.filter.internal.job.FilterStreamConverterJob.runInternal(FilterStreamConverterJob.java:97)
    at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:243)
    at org.xwiki.job.AbstractJob.run(AbstractJob.java:220)
    at org.xwiki.filter.script.internal.ScriptFilterStreamConverterJob.run(ScriptFilterStreamConverterJob.java:75)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:829)