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if ($&) { print; }
perl -E '$x="a0b"; $x=~/0/; say $&; if ($&) { die "not reached!" } if + ($x=~/0/) { say "matched zero" }'
0 matched zero
An Englishman in New York An American Werewolf in London An American in Paris The Innocents Abroad An Idiot Abroad Robinson Crusoe on Mars A Connecticut_Yankee in King Arthur's Court There and Back Again Travels into Several Remote Nations of the World
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