[perl #127906] [REGEX] Sequential array interpolation `||@foo` doesn't backtrack

[Sam S. via RT]

It affects `|` array interpolation as well:

    ➜  say "ab" ~~ / < ab a > b /;    # ｢ab｣
    ➜  say "ab" ~~ / @(<ab a>) b /;   # Nil
    ➜  say "ab" ~~ / |@(<ab a>) b /;  # Nil