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[perl #132645] Array names starting with 'Inf' can be poorlybehaved.

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From:
Father Chrysostomos via RT
Date:
December 22, 2017 21:40
Subject:
[perl #132645] Array names starting with 'Inf' can be poorlybehaved.
Message ID:
rt-4.0.24-31366-1513978833-664.132645-15-0@perl.org
On Fri, 22 Dec 2017 09:41:56 -0800, public@khwilliamson.com wrote:
> I am posting this for Dan Book, who is having trouble getting email to 
> perlbug through.
> 
> The build options and version of perl is immaterial here, except since 5.22.
> 
> When the warning "Scalar value @arrayname[0] better written as 
> $arrayname[0]"
> is triggered (any time an array slice is used with only one element), 
> this results
> in an error if the array's name starts with 'inf'. Code to reproduce:
> 
> use warnings;
> my @infasdf;
> my @x = @infasdf[0];
> 1
> 
> Error from above code (since 5.22): Cannot printf Inf with 'c' at (IRC) 
> line 3.

$ ../perl.git-copy/Porting/bisect.pl --target=miniperl --start=v5.20.0 --end=v5.22.0 -- ./miniperl -Ilib /tmp/foo
...
3396ed3031889b7a6890cbcb14149feb7f1ed41f is the first bad commit
commit 3396ed3031889b7a6890cbcb14149feb7f1ed41f
Author: Jarkko Hietaniemi <jhi@iki.fi>
Date:   Sun Jan 25 12:27:44 2015 -0500

    infnan: Simplify inf parsing.
    
    Accept anything beginning with /^inf/i,
    but warn if there's trailing stuff.

:100644 100644 66b08834448704597e416e7f3a024b8329245bd0 7819c60d94adac3f7b96b11ed816cc12d57b1a27 M	numeric.c
:040000 040000 85a647618418ee945da09230ba2a172f26331d0c 5a472ae9721446be7d90ffdfe00bfb555e1c3d07 M	t
bisect run success
That took 1335 seconds.

-- 

Father Chrysostomos


---
via perlbug:  queue: perl5 status: new
https://rt.perl.org/Ticket/Display.html?id=132645

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