Thank you for the sanity check. I ran your above statements on strawberry perl v5.12.1

> perl -e"use strict; our $x = $x;"
> perl -e"use strict; our $x = qr/(??{ $x })/;"
Variable "$x" is not imported at (re_eval 1) line 2.
Global symbol "$x" requires explicit package name at (re_eval 1) line 
+2.
Compilation failed in regexp at -e line 1.
> perl -e"use strict; my $x = qr/(??{ $x })/;"
Global symbol "$x" requires explicit package name at (re_eval 1) line 
+2.
Compilation failed in regexp at -e line 1.

[download]

And on perl v5.10.0 built for i686-linux

$ perl -e'use strict; our $x=$x;'
$ perl -e'use strict; our $x=qr/(??{ $x })/;'
Variable "$x" is not imported at (re_eval 1) line 2.
Global symbol "$x" requires explicit package name at (re_eval 1) line 
+2.
Compilation failed in regexp at -e line 1.
$ perl -e'use strict; my $x = qr/(??{ $x })/;'
Global symbol "$x" requires explicit package name at (re_eval 1) line 
+2.
Compilation failed in regexp at -e line 1.

[download]

However, done on perl v5.8.0 built for i386-linux-thread-multi, I get no strictures errors and the original parsing code works as desired.:

$ perl -e'use strict; our $x = $x'
$ perl -e'use strict; our $x = qr/(??{ $x })/;'
$ perl -e'use strict; my $x = qr/(??{ $x })/;'

[download]

So this change to the way (??{ code }) was validated for strictures changed at least after v5.8.0. Maybe this was done when (?PARNO) was introduced in v5.10.0. I guess that's one way to encourage people to move to a new feature. Gotta say it's still annoying though.

Update: Added data on my declarations using (??{ code }) per ikegami's request.

In reply to Re^6: (??{ code }) versus (?PARNO) for recursive regular expressions by wind
in thread (??{ code }) versus (?PARNO) for recursive regular expressions by wind

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