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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: expression functions and raise expressions
Date: Sat, 03 Mar 2018 20:54:04 +0000
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Date: 2018-03-03T20:54:04+00:00
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Jere <jhb.chat@gmail.com> writes:

> GNAT GPL 2017 accepts it, but FSF GNAT 7.2 for mingw64 on Win10
> gives some errors:
> test.ads:328:11: (Ada 2005) cannot copy object of a limited type (RM-2005 6.5(5.5/2))
> test.ads:328:11: return by reference not permitted in Ada 2005
>
> NOTE:  Reference_Type is untagged limited discriminated null
> record with Implicit_Dereference defined.  Also note that a similar
> function that returns an aggregate initialization compiles fine
> on both versions.
>
> I am compiling with Ada2012 mode (-gnat12 option)
>
> I believe this to be a bug in GCC 7.2 for mingw64, but wanted to
> make sure I wasn't misreading the RM.  

It's fixed in GCC 8.

It fails in the same way as 7.1.0, same weird error message about 2005,
with GNAT GPL 2016.

(macOS High Sierra)