Determining if a change in perl was backported

syphilis has asked for the wisdom of the Perl Monks concerning the following question:

Hi,

I was looking at a change (between 5.18.0 and 5.20.0) in the numeric flags that are set.
On another list, dave_the_m pointed me to the following commit (which accounts for the change in behaviour):

 commit b127e37e51c21b0a36755dcd19811be931a03d83
 Author: Karl Williamson <pub...@khwilliamson.com>
 Date:   Mon May 13 07:35:35 2013 -0600

  PATCH: [perl #108378] [perl #115800]
  This patch solves two tickets.  Both are a result of the 
 stringification
 of a floating number being sticky, so that the character representing
+ the decimal point may be from an old locale. The patch solves this b
+y not retaining the stringification of NVs.
[download]

Now, I know the commit was not made in time for 5.18.0 (because I have 5.18.0, and it displays the old behaviour) ... and I know it *is* in 5.20.0 (because I have 5.20.0 and it displays the new behaviour).
What I don't know is whether it was ever backported to a subsequent 5.18.x release.
Is there a way to find out by examining publicly available information ?

I tried searching perl5181delta.pod, perl5182delta.pod and perl5184delta.pod for the string NV but that turned up no hits.
I couldn't find a perl5183delta.pod in my perl-5.25.6 source download. (WTF ?)

I guess I could start by grabbing the various 5.18.x distros and see which behaviour they exhibit, but that seems a rather tedious approach.
What guarantee is there that it hasn't been backported to a 5.16.x release ?

I've no issue with the change itself - it serves my purposes fine. I'm just a bit curious to know which versions are affected as it has relevance for Math::MPFR->new($arg) - which takes its cues on how to proceed from $arg's numeric flags.

For those curious about the exact nature of the change, I run (on Windows):

C:\>perl -MDevel::Peek -le "$x = 2.7; print $x; Dump $x;"
[download]

On 5.18.0, the Dump() reveals that the set flags are (NOK,POK,pNOK,pPOK)
On 5.20.0, the Dump() reveals that the set flags are (NOK,pNOK).

Cheers,
Rob

Comment on Determining if a change in perl was backported Select or Download Code

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Re: Determining if a change in perl was backported by dave_the_m (Monsignor) on Nov 07, 2016 at 13:15 UTC
Is there a way to find out by examining publicly available information ? If you have a copy of the git repository, you could try looking for a similar subject line in the maint branches: `$ git log --oneline --grep 108378 origin/maint-5.20 b79536e lib/locale.t: Remove workaround for now fixed #108378 b127e37 PATCH: [perl #108378] [perl #115800] $ git log --oneline --grep 108378 origin/maint-5.18 $ git log --oneline --grep 108378 origin/maint-5.16 $` [download] I couldn't find a perl5183delta.pod in my perl-5.25.6 source download. (WTF ?) That's an interesting oversight! Dave.	[reply] [d/l]
Re^2: Determining if a change in perl was backported by choroba (Cardinal) on Nov 07, 2016 at 17:09 UTC
> That's an interesting oversight! Well, whose oversight? perl5184delta says: > This document describes differences between the 5.18.4 release and the 5.18.2 release. Please note: This document ignores perl 5.18.3, a broken release which existed for a few hours only. ($q=q:Sq=~/;[c](.)(.)/;chr(-\|\|-\|5+lengthSq)`"S\|oS2"`map{chr \|+ord }map{substrSq`S_+\|`\|}3E\|-\|`7**2-3:)=~y+S\|`+$1,++print+eval$q,q,a, [download]	[reply] [d/l]
Re: Determining if a change in perl was backported by Tux (Canon) on Nov 07, 2016 at 17:06 UTC
For this specific issue, you should also look at if your perl is threaded. See how the flags changed over time: `perl5.x.x = untreaded, tperl5.x.x = threaded == perl5.18.0 NOK, READONLY, pNOK == tperl5.18.0 NOK, PADTMP, READONLY, pNOK == perl5.20.0 NOK, READONLY, pNOK == tperl5.20.0 NOK, READONLY, pNOK` [download] The change was shipped with version 5.19.3 Read more... (11 kB) Enjoy, Have FUN! H.Merijn	[reply] [d/l] [select]
Re: Determining if a change in perl was backported by beech (Parson) on Nov 07, 2016 at 19:50 UTC
Hi, You can also use the web interface The change is listed in blead not in v5.18.4 https://perl5.git.perl.org/perl.git/history/51202371ba68f3f52f13124a3ea1bc3c171e0ee2:/sv.c not in https://perl5.git.perl.org/perl.git/history/maint-5.18:/sv.c	[reply]
Re: Determining if a change in perl was backported by syphilis (Archbishop) on Nov 08, 2016 at 10:41 UTC
Thanks for the responses, guys. That should give me enough to work with next time I need an answer to such a question. Cheers, Rob	[reply]