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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Possible GNAT bug,
 but wanted to see if it was a violtion of the RM
Date: Sun, 25 Feb 2018 11:50:44 +0000
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Date: 2018-02-25T11:50:44+00:00
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Jere <jhb.chat@gmail.com> writes:

> I wasn't able to get the GPL debugger to trigger on the exception.  I
> tried stepping through the program but the application just exits at
> the end without the debug info.  I tried putting an exception handler
> and break point in that, but it never catches the exception (so either
> I am not allowed to catch Program_Error or the exception happens
> outside of my main operation).

I just said

   (gdb) catch exception

If this doesn't work - it says

   Your Ada runtime appears to be missing some debugging information.
   Cannot insert Ada exception catchpoint in this configuration.

then invoke gdb with the -readnow switch. This may be a macOS thing, but
see http://sourceware.org/bugzilla/show_bug.cgi?id=11385 .