Do not try to rearrange if the width/height is < 0HEADdev

This also fixes a crash in this peculiar condition:

Item {
    width: 0
    height: 0
    RowLayout {
        anchors.fill: parent
        anchors.leftMargin: 1
        anchors.leftMargin: 1
    }
}

Reason for crash:
As a consequence the layout was rearranged with size == (-1, -1), (which
happens to be the value of uninitialized QSizeF).

This invalid size was passed down to QGridLayoutEngine::setGeometries()
(in the contentsGeometry QRect), and again to ensureGeometries().
ensureGeometries() would return early because of the condition

    if (q_cachedSize == size)

(q_cachedSize is an uninitialized QSizeF by default, and size == (-1, -1)

This caused the q_xx, q_yy, q_widths, and q_height to not be properly
initialized, and it would crash inside
QGridLayoutEngine::setGeometries() when accessing the list:

    qreal x = q_xx.at(item->firstColumn());

Pick-to: 6.2 6.5 6.7
Fixes: QTBUG-124456
Change-Id: I2e3586389aa1728c3622e92bd589af87d11955ae
Reviewed-by: Santhosh Kumar <santhosh.kumar.selvaraj@qt.io>

0 files changed, 0 insertions, 0 deletions