Ghost elements in array

[p6rt]

Migrated from rt.perl.org#131245 (status was 'resolved')

Searchable as RT131245$

[p6rt]

From shreyasls@yahoo.com

# create an array of 5 elements, remove 2, add a fifth one leaving 4th empty

$ perl -e 'my @​a=(1,2,3,4,5); pop(@​a); pop(@​a); $a[4]="hi"; print join(",", @​a)."\n";'

1,2,3,,hi

$ perl6 -e 'my @​a=(1,2,3,4,5); @​a.pop; @​a.pop, @​a[4]="hi"; say @​a.join(",");'

1,2,3,4,hi

Ouch!

 

$ perl6 -v

This is Rakudo version 2017.04.3-160-g08a8075 built on MoarVM version 2017.04-44-gf0db882

implementing Perl 6.c.

Sent from Yahoo Mail on Android

[p6rt]

From @AlexDaniel

This is probably my favorite bug of the year :)

Thank you very much for your report.

There was a discussion about it today​: https://irclog.perlgeek.de/perl6-dev/2017-05-03#i_14521988

On 2017-05-02 10​:42​:33, shreyasls@​yahoo.com wrote​:

# create an array of 5 elements, remove 2, add a fifth one leaving 4th
empty

$ perl -e 'my @​a=(1,2,3,4,5); pop(@​a); pop(@​a); $a[4]="hi"; print
join(",", @​a)."\n";'

1,2,3,,hi

$ perl6 -e 'my @​a=(1,2,3,4,5); @​a.pop; @​a.pop, @​a[4]="hi"; say
@​a.join(",");'

1,2,3,4,hi

Ouch!

$ perl6 -v

This is Rakudo version 2017.04.3-160-g08a8075 built on MoarVM version
2017.04-44-gf0db882

implementing Perl 6.c.

Sent from Yahoo Mail on Android

[p6rt]

The RT System itself - Status changed from 'new' to 'open'

[p6rt]

From @zoffixznet

On Tue, 02 May 2017 10​:42​:33 -0700, shreyasls@​yahoo.com wrote​:

# create an array of 5 elements, remove 2, add a fifth one leaving 4th
empty

$ perl -e 'my @​a=(1,2,3,4,5); pop(@​a); pop(@​a); $a[4]="hi"; print
join(",", @​a)."\n";'

1,2,3,,hi

$ perl6 -e 'my @​a=(1,2,3,4,5); @​a.pop; @​a.pop, @​a[4]="hi"; say
@​a.join(",");'

1,2,3,4,hi

Ouch!

$ perl6 -v

This is Rakudo version 2017.04.3-160-g08a8075 built on MoarVM version
2017.04-44-gf0db882

implementing Perl 6.c.

Sent from Yahoo Mail on Android

Thank you for the report. This is now fixed.

Fix​:
  Raku/nqp@7f71ec87e8d2a0
  MoarVM/MoarVM@8ad18b8460
  rakudo/rakudo@c776c0879e

Tests​:
  Raku/roast@2973f845c8

[p6rt]

@zoffixznet - Status changed from 'open' to 'resolved'