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";
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
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.
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