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

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# New Ticket Created by  Zoffix Znet 
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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.