1.36 DPL3 used in a Template:Subpages. When template accessed from a page and no subpages exist, error occurs.

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1.36 DPL3 used in a Template:Subpages. When template accessed from a page and no subpages exist, error occurs.

Detailed Reproduction Steps:

On MediaWiki 1.36

Template:Subpages

{{#dpl:
titlematch={{{1|{{PAGENAME}}}}}/%
|nottitlematch={{{1|{{PAGENAME}}}}}/%/%{{!}}%Consolidated
|notuses=Template:Draft
|ordermethod=title
|replaceintitle=/./([^/])/,$1
|shownamespace=false
|noresultsheader=''No subpages''
|allowcachedresults=false
}}

Create MediaWiki page with this text:

{{Subpages}}

Error:
[5b103f324a2a2dea9c7a618e] /wiki/index.php?title=ARG&action=submit Error: mysqli_result object is already closed
Backtrace:
from C:\xampp\htdocs\wiki\includes\libs\rdbms\database\DatabaseMysqli.php(176)
#0 C:\xampp\htdocs\wiki\includes\libs\rdbms\database\DatabaseMysqli.php(176): mysqli_result->free_result()
#1 C:\xampp\htdocs\wiki\includes\libs\rdbms\database\DatabaseMysqlBase.php(232): Wikimedia\Rdbms\DatabaseMysqli->mysqlFreeResult(mysqli_result)
#2 (closed) C:\xampp\htdocs\wiki\includes\libs\rdbms\database\DBConnRef.php(68): Wikimedia\Rdbms\DatabaseMysqlBase->freeResult(Wikimedia\Rdbms\ResultWrapper)
#3 (closed) C:\xampp\htdocs\wiki\includes\libs\rdbms\database\DBConnRef.php(290): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#4 (closed) C:\xampp\htdocs\wiki\extensions\DynamicPageList3\includes\Parse.php(246): Wikimedia\Rdbms\DBConnRef->freeResult(Wikimedia\Rdbms\ResultWrapper)
#5 (closed) C:\xampp\htdocs\wiki\extensions\DynamicPageList3\DynamicPageListHooks.php(300): DPL\Parse->parse(string, Parser, NULL, NULL, boolean)
#6 (closed) C:\xampp\htdocs\wiki\includes\parser\Parser.php(3356): DynamicPageListHooks::dplParserFunction(Parser, string, string, string, string, string, string, string, string)
#7 C:\xampp\htdocs\wiki\includes\parser\Parser.php(3041): Parser->callParserFunction(PPTemplateFrame_Hash, string, array)
#8 (closed) C:\xampp\htdocs\wiki\includes\parser\PPFrame_Hash.php(263): Parser->braceSubstitution(array, PPTemplateFrame_Hash)
#9 (closed) C:\xampp\htdocs\wiki\includes\parser\PPTemplateFrame_Hash.php(97): PPFrame_Hash->expand(PPNode_Hash_Tree, integer)
#10 (closed) C:\xampp\htdocs\wiki\includes\parser\Parser.php(3227): PPTemplateFrame_Hash->cachedExpand(string, PPNode_Hash_Tree)
#11 (closed) C:\xampp\htdocs\wiki\includes\parser\PPFrame_Hash.php(263): Parser->braceSubstitution(array, PPFrame_Hash)
#12 C:\xampp\htdocs\wiki\includes\parser\Parser.php(2879): PPFrame_Hash->expand(PPNode_Hash_Tree, integer)
#13 C:\xampp\htdocs\wiki\includes\parser\Parser.php(1549): Parser->replaceVariables(string)
#14 (closed) C:\xampp\htdocs\wiki\includes\parser\Parser.php(639): Parser->internalParse(string)
#15 (closed) C:\xampp\htdocs\wiki\includes\content\WikitextContent.php(375): Parser->parse(string, Title, ParserOptions, boolean, boolean, NULL)
#16 C:\xampp\htdocs\wiki\includes\content\AbstractContent.php(591): WikitextContent->fillParserOutput(Title, NULL, ParserOptions, boolean, ParserOutput)
#17 C:\xampp\htdocs\wiki\includes\Revision\RenderedRevision.php(263): AbstractContent->getParserOutput(Title, NULL, ParserOptions, boolean)
#18 (closed) C:\xampp\htdocs\wiki\includes\Revision\RenderedRevision.php(235): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached(WikitextContent, boolean)
#19 (closed) C:\xampp\htdocs\wiki\includes\Revision\RevisionRenderer.php(217): MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string, array)
#20 C:\xampp\htdocs\wiki\includes\Revision\RevisionRenderer.php(154): MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, array)
#21 [internal function]: MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision{closure}(MediaWiki\Revision\RenderedRevision, array)
#22 (closed) C:\xampp\htdocs\wiki\includes\Revision\RenderedRevision.php(197): call_user_func(Closure, MediaWiki\Revision\RenderedRevision, array)
#23 (closed) C:\xampp\htdocs\wiki\includes\Storage\DerivedPageDataUpdater.php(1347): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#24 (closed) [internal function]: MediaWiki\Storage\DerivedPageDataUpdater->getCanonicalParserOutput()
#25 C:\xampp\htdocs\wiki\includes\edit\PreparedEdit.php(104): call_user_func(array)
#26 C:\xampp\htdocs\wiki\includes\edit\PreparedEdit.php(119): MediaWiki\Edit\PreparedEdit->getOutput()
#27 C:\xampp\htdocs\wiki\includes\Storage\DerivedPageDataUpdater.php(1325): MediaWiki\Edit\PreparedEdit->__get(string)
#28 C:\xampp\htdocs\wiki\includes\page\WikiPage.php(2326): MediaWiki\Storage\DerivedPageDataUpdater->getPreparedEdit()
#29 C:\xampp\htdocs\wiki\extensions\SpamBlacklist\includes\SpamBlacklistHooks.php(34): WikiPage->prepareContentForEdit(WikitextContent)
#30 C:\xampp\htdocs\wiki\includes\HookContainer\HookContainer.php(338): SpamBlacklistHooks::filterMergedContent(DerivativeContext, WikitextContent, Status, string, User, boolean)
#31 C:\xampp\htdocs\wiki\includes\HookContainer\HookContainer.php(137): MediaWiki\HookContainer\HookContainer->callLegacyHook(string, array, array, array)
#32 C:\xampp\htdocs\wiki\includes\HookContainer\HookRunner.php(1559): MediaWiki\HookContainer\HookContainer->run(string, array)
#33 C:\xampp\htdocs\wiki\includes\editpage\Constraint\EditFilterMergedContentHookConstraint.php(90): MediaWiki\HookContainer\HookRunner->onEditFilterMergedContent(DerivativeContext, WikitextContent, Status, string, User, boolean)
#34 C:\xampp\htdocs\wiki\includes\editpage\Constraint\EditConstraintRunner.php(88): MediaWiki\EditPage\Constraint\EditFilterMergedContentHookConstraint->checkConstraint()
#35 (closed) C:\xampp\htdocs\wiki\includes\EditPage.php(2275): MediaWiki\EditPage\Constraint\EditConstraintRunner->checkConstraints()
#36 (closed) C:\xampp\htdocs\wiki\includes\EditPage.php(1694): EditPage->internalAttemptSave(NULL, boolean)
#37 (closed) C:\xampp\htdocs\wiki\includes\EditPage.php(669): EditPage->attemptSave(NULL)
#38 (closed) C:\xampp\htdocs\wiki\includes\actions\EditAction.php(71): EditPage->edit()
#39 (closed) C:\xampp\htdocs\wiki\includes\actions\SubmitAction.php(38): EditAction->show()
#40 (closed) C:\xampp\htdocs\wiki\includes\MediaWiki.php(531): SubmitAction->show()
#41 (closed) C:\xampp\htdocs\wiki\includes\MediaWiki.php(315): MediaWiki->performAction(Article, Title)
#42 C:\xampp\htdocs\wiki\includes\MediaWiki.php(913): MediaWiki->performRequest()
#43 C:\xampp\htdocs\wiki\includes\MediaWiki.php(546): MediaWiki->main()
#44 (closed) C:\xampp\htdocs\wiki\index.php(53): MediaWiki->run()
#45 (closed) C:\xampp\htdocs\wiki\index.php(46): wfIndexMain()
#46 (closed) {main}