Still throws a strictures warning.

Of course. Variable declarations includes our.

These work: 

1. no strict;  $x = qr/(??{ $x })/;
2. use strict; our $x = qr/(??{ our $x })/
3. use strict; our $x = qr/(??{ no strict; $x })/
4. use strict; our $x; $x = qr/(??{ $x })/
5. use strict; my $x; $x = qr/(??{ $x })/

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I think there was once a bug where some or all pragmas didn't propagate into (??{ }) and the like. If so, the following would have worked because it would have been equivalent to #3 above: 

6. use strict; our $x = qr/(??{ $x })/

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The earliest I have here is 5.10.1, and it doesn't have this bug.

In reply to Re^3: (??{ code }) versus (?PARNO) for recursive regular expressions by ikegami
in thread (??{ code }) versus (?PARNO) for recursive regular expressions by wind

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