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From: Duncan Sands <baldrick@free.fr>
Newsgroups: comp.lang.ada
Subject: Re: Problem with finalized protected object
Date: Wed, 7 Jul 2004 12:53:13 +0200
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Date: 2004-07-07T12:53:13+02:00

> I have a program that, when ended, gives the following error:
> 
> Execution terminated by unhandled exception
> Exception name: PROGRAM_ERROR
> Message: Protected Object is finalized
> Call stack traceback locations:
> 0x8ab417b 0x8ad5d4e 0x8ad5940 0x8ad5893 0x8aab4d8

While it's most likely that your program is wrong, it is also true
that GNAT's finalization implementation is buggy: if you use (say)
valgrind to watch a program mixing tasks and controlled objects
in the right way, you quickly discover that during finalization the
run-time system is trying to use tasking structures that it has already
freed.  This leads to "interesting" behavior on program finalization.

Ciao,

Duncan.