Accidential activation of items in context menus

Description:

When opening and immediately closing a context menu by doing two right-clicks without moving the mouse pointer in between, Qt5 currently selects the first item of the context menu.

Expected behavior:

I would expect that the second mouse click simply closes the menu without activating an item.

Actual behavior:

The first item of the context menu is activated, probably without user intention.

Regression:

I think this is a usability issue since many users will probably activate items in the context menu without intending so. I examined the behavior on different systems (Windows 7, OSX, other Linux Desktops), they all simply close a context menu on the second mouse click.

Steps to reproduce:

• build a sample project containing a widget that handles
  the context-menu event (see code-snippet nelow)
• position mouse in this widget and hold the mouse still,
  i.e. the mouse pointer shall not move
• right click on the mouse to open a context menu
• right click again

=> the first action of the menu is activated

Example codesnippet:

void Widget::contextMenuEvent (QContextMenuEvent *event)
{
QPoint where (event->globalPos ());
QMenu menu;
... // build menu contents
QAction *selectedAction = menu.exec (where);
...
}

Workaround / possible solution:

I would suggest to translate the given position for the menu by 1 pixel in x and y direction and opening the menu at the translated position. So the mouse pointer is not hovering the first menu item.