The fontdatabase is leaking something (the fontengine?)

==3287== 1,268 (116 direct, 1,152 indirect) bytes in 1 blocks are definitely lost in loss record 737 of 831
==3287== at 0x402641D: operator new(unsigned int) (vg_replace_malloc.c:255)
==3287== by 0x4959BF9: loadEngine(int, QFontDef const&, QtFontFamily*, QtFontFoundry*, QtFontStyle*, QtFontSize*) (qfontdatabase_qpa.cpp:180)
==3287== by 0x495A425: QFontDatabase::findFont(int, QFontPrivate const*, QFontDef const&) (qfontdatabase_qpa.cpp:293)
==3287== by 0x495A963: QFontDatabase::load(QFontPrivate const*, int) (qfontdatabase_qpa.cpp:362)
==3287== by 0x4937786: QFontPrivate::engineForScript(int) const (qfont.cpp:282)
==3287== by 0x498018D: QScriptLine::setDefaultHeight(QTextEngine*) (qtextengine.cpp:2166)
==3287== by 0x498D9B7: QTextLine::layout_helper(int) (qtextlayout.cpp:1738)
==3287== by 0x498D167: QTextLine::setLineWidth(double) (qtextlayout.cpp:1558)
==3287== by 0x49DF367: QTextDocumentLayoutPrivate::layoutBlock(QTextBlock const&, int, QTextBlockFormat const&, QTextLayoutStruct*, int, int, QTextBlockFormat const*) (qtextdocumentlayout.cpp:2616)
==3287== by 0x49DDEB0: QTextDocumentLayoutPrivate::layoutFlow(QTextFrame::iterator, QTextLayoutStruct*, int, int, QFixed) (qtextdocumentlayout.cpp:2402)
==3287== by 0x49DC714: QTextDocumentLayoutPrivate::layoutFrame(QTextFrame*, int, int, QFixed, QFixed, QFixed) (qtextdocumentlayout.cpp:2143)
==3287== by 0x49DBC77: QTextDocumentLayoutPrivate::layoutFrame(QTextFrame*, int, int, QFixed) (qtextdocumentlayout.cpp:2049)
==3287== by 0x49E1007: QTextDocumentLayout::doLayout(int, int, int) (qtextdocumentlayout.cpp:2939)
==3287== by 0x49E1CBC: QTextDocumentLayoutPrivate::ensureLayoutedByPosition(int) const (qtextdocumentlayout.cpp:3111)
==3287== by 0x49E1D23: QTextDocumentLayoutPrivate::layoutStep() const (qtextdocumentlayout.cpp:3117)
==3287== by 0x49E0CF7: QTextDocumentLayout::documentChanged(int, int, int) (qtextdocumentlayout.cpp:2899)
==3287== by 0x49A840B: QTextDocument::setPageSize(QSizeF const&) (qtextdocument.cpp:1561)
==3287== by 0x437E43C: QTextEditPrivate::relayoutDocument() (qtextedit.cpp:1402)
==3287== by 0x437E1CD: QTextEdit::resizeEvent(QResizeEvent*) (qtextedit.cpp:1361)
==3287== by 0x418D47C: QWidget::event(QEvent*) (qwidget.cpp:8084)

==3287== 3,668 (72 direct, 3,596 indirect) bytes in 1 blocks are definitely lost in loss record 770 of 831
==3287== at 0x402641D: operator new(unsigned int) (vg_replace_malloc.c:255)
==3287== by 0x4E44B9F: QObject::QObject(QObject*) (qobject.cpp:725)
==3287== by 0x4940E5B: QFontEngine::QFontEngine() (qfontengine.cpp:171)
==3287== by 0x6D95A93: QFontEngineFT::QFontEngineFT(QFontDef const&) (qfontengine_ft.cpp:632)
==3287== by 0x6D9F990: QFontconfigDatabase::fontEngine(QFontDef const&, QUnicodeTables::Script, void*) (qfontconfigdatabase.cpp:509)
==3287== by 0x49599A1: loadSingleEngine(int, QFontDef const&, QtFontFoundry*, QtFontStyle*, QtFontSize*) (qfontdatabase_qpa.cpp:146)
==3287== by 0x4959A97: loadEngine(int, QFontDef const&, QtFontFamily*, QtFontFoundry*, QtFontStyle*, QtFontSize*) (qfontdatabase_qpa.cpp:161)
==3287== by 0x495A425: QFontDatabase::findFont(int, QFontPrivate const*, QFontDef const&) (qfontdatabase_qpa.cpp:293)
==3287== by 0x495A963: QFontDatabase::load(QFontPrivate const*, int) (qfontdatabase_qpa.cpp:362)
==3287== by 0x4937786: QFontPrivate::engineForScript(int) const (qfont.cpp:282)
==3287== by 0x498018D: QScriptLine::setDefaultHeight(QTextEngine*) (qtextengine.cpp:2166)
==3287== by 0x498D9B7: QTextLine::layout_helper(int) (qtextlayout.cpp:1738)
==3287== by 0x498D167: QTextLine::setLineWidth(double) (qtextlayout.cpp:1558)
==3287== by 0x49DF367: QTextDocumentLayoutPrivate::layoutBlock(QTextBlock const&, int, QTextBlockFormat const&, QTextLayoutStruct*, int, int, QTextBlockFormat const*) (qtextdocumentlayout.cpp:2616)
==3287== by 0x49DDEB0: QTextDocumentLayoutPrivate::layoutFlow(QTextFrame::iterator, QTextLayoutStruct*, int, int, QFixed) (qtextdocumentlayout.cpp:2402)
==3287== by 0x49DC714: QTextDocumentLayoutPrivate::layoutFrame(QTextFrame*, int, int, QFixed, QFixed, QFixed) (qtextdocumentlayout.cpp:2143)
==3287== by 0x49DBC77: QTextDocumentLayoutPrivate::layoutFrame(QTextFrame*, int, int, QFixed) (qtextdocumentlayout.cpp:2049)
==3287== by 0x49E1007: QTextDocumentLayout::doLayout(int, int, int) (qtextdocumentlayout.cpp:2939)
==3287== by 0x49E1CBC: QTextDocumentLayoutPrivate::ensureLayoutedByPosition(int) const (qtextdocumentlayout.cpp

==3287== 1,518,174 (40 direct, 1,518,134 indirect) bytes in 1 blocks are definitely lost in loss record 830 of 831
==3287== at 0x4026864: malloc (vg_replace_malloc.c:236)
==3287== by 0x6F447BC: ??? (in /usr/lib/i386-linux-gnu/libfreetype.so.6.6.2)
==3287== by 0x6F4936A: ft_mem_qalloc (in /usr/lib/i386-linux-gnu/libfreetype.so.6.6.2)
==3287== by 0x6F493C2: ft_mem_alloc (in /usr/lib/i386-linux-gnu/libfreetype.so.6.6.2)
==3287== by 0x6F4CC4C: FT_Add_Module (in /usr/lib/i386-linux-gnu/libfreetype.so.6.6.2)
==3287== by 0x6F44B56: FT_Add_Default_Modules (in /usr/lib/i386-linux-gnu/libfreetype.so.6.6.2)
==3287== by 0x6F44BB9: FT_Init_FreeType (in /usr/lib/i386-linux-gnu/libfreetype.so.6.6.2)
==3287== by 0x6D93B22: QFreetypeFace::getFace(QFontEngine::FaceId const&, QByteArray const&) (qfontengine_ft.cpp:223)
==3287== by 0x6D95E19: QFontEngineFT::init(QFontEngine::FaceId, bool, QFontEngine::GlyphFormat, QByteArray const&) (qfontengine_ft.cpp:675)
==3287== by 0x6D9F9F6: QFontconfigDatabase::fontEngine(QFontDef const&, QUnicodeTables::Script, void*) (qfontconfigdatabase.cpp:512)
==3287== by 0x49599A1: loadSingleEngine(int, QFontDef const&, QtFontFoundry*, QtFontStyle*, QtFontSize*) (qfontdatabase_qpa.cpp:146)
==3287== by 0x4959A97: loadEngine(int, QFontDef const&, QtFontFamily*, QtFontFoundry*, QtFontStyle*, QtFontSize*) (qfontdatabase_qpa.cpp:161)
==3287== by 0x495A425: QFontDatabase::findFont(int, QFontPrivate const*, QFontDef const&) (qfontdatabase_qpa.cpp:293)
==3287== by 0x495A963: QFontDatabase::load(QFontPrivate const*, int) (qfontdatabase_qpa.cpp:362)
==3287== by 0x4937786: QFontPrivate::engineForScript(int) const (qfont.cpp:282)
==3287== by 0x498018D: QScriptLine::setDefaultHeight(QTextEngine*) (qtextengine.cpp:2166)
==3287== by 0x498D9B7: QTextLine::layout_helper(int) (qtextlayout.cpp:1738)
==3287== by 0x498D167: QTextLine::setLineWidth(double) (qtextlayout.cpp:1558)
==3287== by 0x49DF367: QTextDocumentLayoutPrivate::layoutBlock(QTextBlock const&, int, QTextBlockFormat const&, QTextLayoutStruct*, int, int, QTextBlockFormat const*) (qtextdocumentlayout.cpp:2616)
==3287== by 0x49DDEB0: QTextDocumentLayoutPrivate::layoutFlow(QTextFrame::iterator, QTextLayoutStruct*, int, int, QFixed) (qtextdocumentlayout.cpp:2402)
==3287==