I'm still using version 9.1.1 in Delphi 10.4 and noticed an AV with a TImageEnMView when a TImageEnView is attached to it while closing a form. The error message: (sorry, German IDE)
--------------------------- Benachrichtigung über Debugger-Exception --------------------------- Im Projekt Sample.exe ist eine Exception der Klasse EAccessViolation mit der Meldung 'Zugriffsverletzung bei Adresse 006A744C in Modul 'Sample.exe'. Lesen von Adresse 00000050' aufgetreten. --------------------------- Anhalten Fortsetzen Hilfe ---------------------------
Debugging through the ImageEn source files shows a Timer component being created in "TIECustomMView.DelayedUpdateAttachedImageEnView();" every time an update is called onto the component overwriting the same member variable over and over without freeing it before. This causes some Timers to get stuck in an endless loop as they're only disabling the newly assigned Timer objects if one was created before the timer event kicked in. I guess these Timer components then cause an AV when the form closes and the whole TImageEnMView component is freed.
I didn't find anything about this in the release notes, has this been fixed in some later version? And is there any workaround for my current version?
Yes, as best as I recall, there was an issue there, that was fixed many versions ago (9.3.0, I think). I'm out of the office until late June so I cannot confirm a workaround, but you should be able to set AttachedImageEnView to nil in your form closing code to prevent it.
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Access violation with TImageEnMView
Posted - Jun 15 2023 : 10:09:35
