comment on

Still working through old reported issues and think I have another upstream bug. Take this:

use Tie::Array;
tie my @array_t, 'Tie::StdArray';
my @array = @array_t = qw[aaa bbb ccc ddd eee];
print "plain smatch: " . (/a/ ~~ @array) . "\n";
print "plain grep:   " . (grep {/a/} @array) . "\n";
print "tied smatch:  " . (/a/ ~~ @array_t) . "\n";
print "tied grep:    " . (grep {/a/} @array_t) . "\n";
[download]

When run on my v5.16.3 install, the smartmatch doesn't correctly match against the magically tied @array_t. Devel::Trace shows that it calls the array's FETCHSIZE method just like the tied grep but never bothers to FETCH the correct values. So, I end up with output that looks like:

Use of uninitialized value in pattern match (m//) at bugs.t line 6.
Use of uninitialized value in pattern match (m//) at bugs.t line 6.
Use of uninitialized value in pattern match (m//) at bugs.t line 6.
Use of uninitialized value in pattern match (m//) at bugs.t line 6.
Use of uninitialized value in pattern match (m//) at bugs.t line 6.
plain smatch: 1
plain grep:   1
tied smatch:  
tied grep:    1
[download]

The warnings are obviously from smartmatch trying to match against undefined values. Can anyone verify that I'm not 'doing it wrong' before I submit a bug report to p5p?

Update: Reported as RT#120122.

In reply to Buggy smartmatch on tied array? by SankoR

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		`&`
	<		`<`
	>		`>`
	[		`[`
	]		`]`

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.


Clear questions and runnable code get the best and fastest answer
	PerlMonks