Fix possible crash in QmlJS semantic checker.
Fix possible crash in QmlJS semantic checker.

jonnor/qt-creator,duythanhphan/qt-creator,sandsmark/qtcreator-minimap,yinyunqiao/qtcreator,enricoros/k-qt-creator-inspector,renatofilho/QtCreator,kuba1/qtcreator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,farseerri/git_code,KDAB/KDAB-Creator,bakaiadam/collaborative_qt_creator,amyvmiwei/qt-creator,malikcjm/qtcreator,xianian/qt-creator,bakaiadam/collaborative_qt_creator,renatofilho/QtCreator,yinyunqiao/qtcreator,hdweiss/qt-creator-visualizer,richardmg/qtcreator,syntheticpp/qt-creator,renatofilho/QtCreator,martyone/sailfish-qtcreator,farseerri/git_code,danimo/qt-creator,malikcjm/qtcreator,farseerri/git_code,maui-packages/qt-creator,sandsmark/qtcreator-minimap,colede/qtcreator,KDAB/KDAB-Creator,xianian/qt-creator,sandsmark/qtcreator-minimap,jonnor/qt-creator,farseerri/git_code,danimo/qt-creator,colede/qtcreator,farseerri/git_code,AltarBeastiful/qt-creator,yinyunqiao/qtcreator,KDE/android-qt-creator,AltarBeastiful/qt-creator,syntheticpp/qt-creator,omniacreator/qtcreator,farseerri/git_code,KDAB/KDAB-Creator,AltarBeastiful/qt-creator,ostash/qt-creator-i18n-uk,yinyunqiao/qtcreator,ostash/qt-creator-i18n-uk,xianian/qt-creator,martyone/sailfish-qtcreator,pcacjr/qt-creator,darksylinc/qt-creator,martyone/sailfish-qtcreator,darksylinc/qt-creator,syntheticpp/qt-creator,ostash/qt-creator-i18n-uk,KDAB/KDAB-Creator,KDE/android-qt-creator,danimo/qt-creator,malikcjm/qtcreator,syntheticpp/qt-creator,farseerri/git_code,darksylinc/qt-creator,dmik/qt-creator-os2,Distrotech/qtcreator,omniacreator/qtcreator,duythanhphan/qt-creator,enricoros/k-qt-creator-inspector,ostash/qt-creator-i18n-uk,AltarBeastiful/qt-creator,richardmg/qtcreator,darksylinc/qt-creator,ostash/qt-creator-i18n-uk,pcacjr/qt-creator,Distrotech/qtcreator,sandsmark/qtcreator-minimap,azat/qtcreator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,syntheticpp/qt-creator,enricoros/k-qt-creator-inspector,maui-packages/qt-creator,AltarBeastiful/qt-creator,hdweiss/qt-creator-visualizer,duythanhphan/qt-creator,danimo/qt-creator,darksylinc/qt-creator,richardmg/qtcreator,KDE/android-qt-creator,jonnor/qt-creator,renatofilho/QtCreator,colede/qtcreator,omniacreator/qtcreator,hdweiss/qt-creator-visualizer,kuba1/qtcreator,richardmg/qtcreator,azat/qtcreator,martyone/sailfish-qtcreator,enricoros/k-qt-creator-inspector,ostash/qt-creator-i18n-uk,darksylinc/qt-creator,pcacjr/qt-creator,KDAB/KDAB-Creator,malikcjm/qtcreator,sandsmark/qtcreator-minimap,dmik/qt-creator-os2,richardmg/qtcreator,darksylinc/qt-creator,KDE/android-qt-creator,malikcjm/qtcreator,KDE/android-qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,bakaiadam/collaborative_qt_creator,duythanhphan/qt-creator,amyvmiwei/qt-creator,xianian/qt-creator,colede/qtcreator,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,bakaiadam/collaborative_qt_creator,jonnor/qt-creator,dmik/qt-creator-os2,malikcjm/qtcreator,kuba1/qtcreator,jonnor/qt-creator,danimo/qt-creator,Distrotech/qtcreator,bakaiadam/collaborative_qt_creator,danimo/qt-creator,Distrotech/qtcreator,hdweiss/qt-creator-visualizer,pcacjr/qt-creator,dmik/qt-creator-os2,pcacjr/qt-creator,yinyunqiao/qtcreator,enricoros/k-qt-creator-inspector,maui-packages/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,yinyunqiao/qtcreator,KDE/android-qt-creator,xianian/qt-creator,darksylinc/qt-creator,jonnor/qt-creator,pcacjr/qt-creator,KDE/android-qt-creator,danimo/qt-creator,KDAB/KDAB-Creator,martyone/sailfish-qtcreator,Distrotech/qtcreator,amyvmiwei/qt-creator,ostash/qt-creator-i18n-uk,kuba1/qtcreator,duythanhphan/qt-creator,azat/qtcreator,kuba1/qtcreator,xianian/qt-creator,kuba1/qtcreator,xianian/qt-creator,richardmg/qtcreator,bakaiadam/collaborative_qt_creator,amyvmiwei/qt-creator,syntheticpp/qt-creator,kuba1/qtcreator,KDE/android-qt-creator,renatofilho/QtCreator,danimo/qt-creator,AltarBeastiful/qt-creator,maui-packages/qt-creator,amyvmiwei/qt-creator,syntheticpp/qt-creator,enricoros/k-qt-creator-inspector,maui-packages/qt-creator,hdweiss/qt-creator-visualizer,dmik/qt-creator-os2,omniacreator/qtcreator,Distrotech/qtcreator,azat/qtcreator,duythanhphan/qt-creator,dmik/qt-creator-os2,bakaiadam/collaborative_qt_creator,yinyunqiao/qtcreator,malikcjm/qtcreator,kuba1/qtcreator,hdweiss/qt-creator-visualizer,Distrotech/qtcreator,farseerri/git_code,omniacreator/qtcreator,enricoros/k-qt-creator-inspector,maui-packages/qt-creator,richardmg/qtcreator,colede/qtcreator,colede/qtcreator,azat/qtcreator,amyvmiwei/qt-creator,sandsmark/qtcreator-minimap,maui-packages/qt-creator,xianian/qt-creator,renatofilho/QtCreator,omniacreator/qtcreator,duythanhphan/qt-creator,dmik/qt-creator-os2,azat/qtcreator,colede/qtcreator,omniacreator/qtcreator,pcacjr/qt-creator