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

In reply to Determining if a change in perl was backported by syphilis

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