[MacPorts] #46607: qt4-mac +KDE variant.

[MacPorts]

#46607: qt4-mac +KDE variant.
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  Reporter:  rjvbertin@…  |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  qt4-mac      |
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Comment (by rjvbertin@…):

 Re: patch-QAction_isEnabled.diff : the stale pointer access prevented by
 this patch is most likely also due to a pending event being delivered to
 an already deleted object. It's not a proper fix (unless you believe in
 defensive programming). If my assessment is correct, the real bug is in
 client code that does `delete object` instead of `object->deleteLater()`
 (which is comparable to ObjC's `[obj release]`). The problem is that it is
 neigh impossible to determine which `object` that is; the address stored
 in the stale pointer corresponds to a (member of a ) member variable of
 that object, and the crash occurs at some undeterminate moment after that
 object was deleted.

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Ticket URL: <https://trac.macports.org/ticket/46607#comment:1>
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