[perl #131307] warning-less sub closure over a variable declared later in same scope

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# New Ticket Created by  Zoffix Znet 
# Please include the string:  [perl #131307]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=131307 >


https://irclog.perlgeek.de/perl6-dev/2017-05-13#i_14576917

16:35   Zoffix  m: my $x = 72; { sub foo { say $x }; foo ; my $x = 42; say $x }
16:35   camelia rakudo-moar 83b7ac: OUTPUT: «(Any)␤42␤»
16:37   TimToady        should probably get the "already bound to outer symbol" 
warning
16:37           m: my $x = 72; { say $x; my $x = 42; say $x }
16:37   camelia rakudo-moar 83b7ac: OUTPUT: «5===SORRY!5=== Error while 
compiling <tmp>␤Lexical symbol '$x' is already bound to an outer symbol;␤the 
implicit outer binding must be rewritten as OUTER::<$x>␤before you can 
unambiguously declare a new '$x' in this scope␤at <tmp>:1␤------>…»
16:38   TimToady        like that one