test/closures/upvals.pl: perl cannot mix mixed protocheck
only if cl4i is made lexical
upvals.pl p5 compat

perl5.19.4d-nt\@blead -Mfeature=lexical_subs test/closures/upvals.pl
@a is in scalar context => 2
(b=2) lists are not possible quoted as in LISP
cl inside cl returns the name not the proto