1 files changed, 4 insertions, 1 deletions
diff --git a/src/widgets/itemviews/qheaderview.cpp b/src/widgets/itemviews/qheaderview.cpp
index 00e9ff7400..6dc0543255 100644
--- a/src/widgets/itemviews/qheaderview.cpp
+++ b/src/widgets/itemviews/qheaderview.cpp
@@ -1853,11 +1853,13 @@ bool QHeaderView::restoreState(const QByteArray &state)
 */
 void QHeaderView::reset()
 {
+    Q_D(QHeaderView);
     QAbstractItemView::reset();
     // it would be correct to call clear, but some apps rely
     // on the header keeping the sections, even after calling reset
     //d->clear();
     initializeSections();
+    d->invalidateCachedSizeHint();
 }
 
 /*!
@@ -2871,6 +2873,7 @@ bool QHeaderView::viewportEvent(QEvent *e)
         }
         return true; }
 #endif // QT_CONFIG(statustip)
+    case QEvent::Resize:
     case QEvent::FontChange:
     case QEvent::StyleChange:
         d->invalidateCachedSizeHint();
@@ -4086,7 +4089,7 @@ bool QHeaderViewPrivate::read(QDataStream &in)
     }
 
     int sectionItemsLengthTotal = 0;
-    foreach (const SectionItem &section, newSectionItems)
+    for (const SectionItem &section : qAsConst(newSectionItems))
         sectionItemsLengthTotal += section.size;
     if (sectionItemsLengthTotal != lengthIn)
         return false;