[perl #131790] [BUG] :delete silently fails on lazy Arrays

[Jan-Olof Hendig via RT]

On Mon, 24 Jul 2017 09:09:55 -0700, c...@zoffix.com wrote:
> m: my @a is default(42) = 1...*; @a[1]:delete; say @a[1]:exists; .say
> for @a[^10]
> rakudo-moar 2fb8c7: OUTPUT: «True␤1␤2␤3␤4␤5␤6␤7␤8␤9␤10␤»
> 
> Expected: reify until `1`, delete it, and have `@a[1]:exists` give
> False, and `.say for @a[^10]` give 42 for the second element.

This was fixed with commit 
https://github.com/rakudo/rakudo/commit/0385b2aa4554eca1421081968642a43f883889cd
Test was added with commit 
https://github.com/perl6/roast/commit/9cc47b28a9f4c7a6256a8521080620a50bed75a8