#!/usr/bin/env perl
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use warnings;
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use strict;
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use 5.10.0;
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my $intentionally_broken_regex = '[';
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my $compiled_regex;
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eval {
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$compiled_regex = qr/$intentionally_broken_regex/;
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};
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if ($@) {
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# There should be an error, so let's just quote everything:
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$compiled_regex = qr/\Q$intentionally_broken_regex\E/
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}
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