From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 X-Received: by 2002:ad4:53a7:: with SMTP id j7mr2444798qvv.77.1571934397249; Thu, 24 Oct 2019 09:26:37 -0700 (PDT) X-Received: by 2002:aca:5714:: with SMTP id l20mr5233655oib.175.1571934396932; Thu, 24 Oct 2019 09:26:36 -0700 (PDT) Path: eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!news.dns-netz.com!news.freedyn.net!newsreader4.netcologne.de!news.netcologne.de!peer02.ams1!peer.ams1.xlned.com!news.xlned.com!peer02.am4!peer.am4.highwinds-media.com!peer01.iad!feed-me.highwinds-media.com!news.highwinds-media.com!h21no2248028qto.0!news-out.google.com!x7ni765qtf.0!nntp.google.com!h21no2248025qto.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Thu, 24 Oct 2019 09:26:36 -0700 (PDT) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=47.185.223.245; posting-account=zwxLlwoAAAChLBU7oraRzNDnqQYkYbpo NNTP-Posting-Host: 47.185.223.245 References: <21bc3da1-b548-44c1-af02-6843a34e0611@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <2190c00e-6d8e-4659-a2de-a78861596e0b@googlegroups.com> Subject: Re: Referring to the instance of a generic parent package From: Optikos Injection-Date: Thu, 24 Oct 2019 16:26:37 +0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Received-Bytes: 4058 X-Received-Body-CRC: 23705487 Xref: reader01.eternal-september.org comp.lang.ada:57339 Date: 2019-10-24T09:26:36-07:00 List-Id: On Thursday, October 24, 2019 at 4:35:53 AM UTC-5, Alejandro R. Mosteo wrot= e: > On 23/10/19 18:29, Shark8 wrote: > > On Wednesday, October 23, 2019 at 6:54:41 AM UTC-6, Alejandro R. Mosteo= wrote: > >> > >> The whole issue is not critical; I'm just generally curious. I'm > >> experimenting with heavily nested generic child hierarchies and findin= g > >> lots of corner cases (and visibility bugs). > >=20 > > Thank you for the efforts, please write up an Ada Issue (AI) for the pr= oblems you encounter so that the ARG can fix them. >=20 > I meant in GNAT... I guess Ada itself is correct. The problem with these= =20 > issues is that they disappear when I try to prepare a small reproducer. Then don't start from scratch additively. Instead prepare this subtractive= ly instead: 1) change all the identifier names to something meaningless like v1, v2, v3= , =E2=80=A6 for variables and t1, t2, t3, =E2=80=A6 for types to obfuscate = what you'd prefer to not release publicly then 2) loop 2.1) Remove one seemingly-extraneous statement. 2.2) Recompile to see whether the aberrant compiler behavior is still exhib= ited. 2.3) If so, repeat this loop with a different seemingly-extraneous statemen= t. 2.4) If not, then put that seemingly-extraneous statement back in because i= t was not extraneous after all, but in fact sympathetic to contributing to = the concomitant situation that evokes the bug in the compiler. Then repeat= this loop with a different seemingly-extraneous statement. When no more seemingly-extraneous statements remain, you will have subtract= ively pruned your aberrant source code down to the minimum that it takes to= put the compiler into its troubled internal state (e.g., just the right br= anches of the AST to cause a buggy walk of the AST to mishandle something).= Hopefully, between the renaming of identifiers en masse and the repeated = incremental pruning, nothing human-recognizable will remain about the desig= n that you'd prefer to not be made public. Then submit the fully-pruned re= sulting source code to both FSF and AdaCore for the versions at which the a= berrant compiler behavior is exhibited. And additionally, please report back to c.l.a if there is a discernible pat= tern of FSF GNAT perennially having a bug that AdaCore GPL CommunityEdition= perennially lacks, or a discernible delay of FSF GNAT having a bug for =E2= =80=9Ctoo long=E2=80=9D (that is eventually fixed in FSF GNAT) after being = fixed in a release of AdaCore GPL CommunityEdition multiple years prior. E= ither of those temporal situations would be interesting to observe if eithe= r were to exist.