diff options
| author | Volker Hilsheimer <volker.hilsheimer@qt.io> | 2021-02-25 17:04:06 +0100 |
|---|---|---|
| committer | Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> | 2021-03-04 05:49:48 +0000 |
| commit | 0f269e24949a1828bd8896c97e87c0bd4ad38532 (patch) | |
| tree | a1569dfd5d0a943023daf00cdcac187751503cbe /src | |
| parent | 2c42df30340041883654360816d5b767d433cd95 (diff) | |
QGraphicsWidget: Check for nullptrs in focus chain handling
The while loops terminate if focusAfter becomes nullptr (unless we break
earlier), so don't dereference those pointers without checking first.
Fixes static analzyer warnings 979f2d508db4d5838f6c9b296120ce60 and
481f2ec7b5851bf19414478428f944b7
Change-Id: I60fc5999907fe3b3146d7047ee1eff197719ab31
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Oliver Eftevaag <oliver.eftevaag@qt.io>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
(cherry picked from commit 95e34f7fbc0f2e9ca582278f9a772b27ebf93d5f)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/widgets/graphicsview/qgraphicswidget_p.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/widgets/graphicsview/qgraphicswidget_p.cpp b/src/widgets/graphicsview/qgraphicswidget_p.cpp index 0580c6d938..d989455596 100644 --- a/src/widgets/graphicsview/qgraphicswidget_p.cpp +++ b/src/widgets/graphicsview/qgraphicswidget_p.cpp @@ -784,7 +784,8 @@ void QGraphicsWidgetPrivate::fixFocusChainBeforeReparenting(QGraphicsWidget *new // detach from current focus chain; skip this widget subtree. focusBefore->d_func()->focusNext = focusAfter; - focusAfter->d_func()->focusPrev = focusBefore; + if (focusAfter) + focusAfter->d_func()->focusPrev = focusBefore; if (newParent) { // attach to new parent's focus chain as the last element @@ -800,7 +801,8 @@ void QGraphicsWidgetPrivate::fixFocusChainBeforeReparenting(QGraphicsWidget *new newFocusLast->d_func()->focusNext = q; focusLast->d_func()->focusNext = newFocusAfter; - newFocusAfter->d_func()->focusPrev = focusLast; + if (newFocusAfter) + newFocusAfter->d_func()->focusPrev = focusLast; focusPrev = newFocusLast; } else { // no new parent, so just link up our own prev->last widgets. |