From @lizmat

use nqp; my str @​a = "a".."e"; nqp​::setelems(@​a,0); nqp​::setelems(@​a,5); say @​a.join("​:”)
a​:b​:c​:d​:e

expected​:
:​::​:

same for int / num arrays.

From @lizmat

On 21 Mar 2016, at 16​:41, Elizabeth Mattijsen (via RT) <perl6-bugs-followup@​perl.org> wrote​:

# New Ticket Created by Elizabeth Mattijsen
# Please include the string​: [perl #​127756]
# in the subject line of all future correspondence about this issue.
# <URL​: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=127756 >

use nqp; my str @​a = "a".."e"; nqp​::setelems(@​a,0); nqp​::setelems(@​a,5); say @​a.join("​:”)
a​:b​:c​:d​:e

expected​:
:​::​:

same for int / num arrays.

And the same for Bufs.reallocate​:

$ 6 'dd Buf.allocate(10, (1,2,3)).reallocate(0).reallocate(5)'
Buf.new(1,2,3,1,2)

From @zoffixznet

Still present today on rakudo 89470a​:

<Zoffix> m​: use nqp; my str @​a = "a".."e"; nqp​::setelems(@​a,0); nqp​::setelems(@​a,5); say @​a.join("​:")
<camelia> rakudo-moar 89470a​: OUTPUT«a​:b​:c​:d​:e␤»
<Zoffix> m​: say Buf.allocate(10, (1,2,3)).reallocate(0).reallocate(5)
<camelia> rakudo-moar 89470a​: OUTPUT«Buf​:0x<01 02 03 01 02>␤»

From @zoffixznet

On Tue, 22 Mar 2016 07​:10​:54 -0700, elizabeth wrote​:

On 21 Mar 2016, at 16​:41, Elizabeth Mattijsen (via RT) <perl6-bugs-
followup@​perl.org> wrote​:

# New Ticket Created by Elizabeth Mattijsen
# Please include the string​: [perl #​127756]
# in the subject line of all future correspondence about this issue.
# <URL​: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=127756 >

use nqp; my str @​a = "a".."e"; nqp​::setelems(@​a,0);
nqp​::setelems(@​a,5); say @​a.join("​:”)
a​:b​:c​:d​:e

expected​:
:​::​:

same for int / num arrays.

And the same for Bufs.reallocate​:

$ 6 'dd Buf.allocate(10, (1,2,3)).reallocate(0).reallocate(5)'
Buf.new(1,2,3,1,2)

Thank you for the report. This is now fixed.

Fix​: MoarVM/MoarVM@43c926f9e0
  Raku/nqp@e64fb5b44b
  rakudo/rakudo@e5bb9bd20cdd319
Tests​: Raku/roast@20b76e6274969787e
  Raku/roast@946e42eb08
Unfudge​: Raku/roast@8533ec69249bf2b30

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

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