exit code build Cache::Memcached

gistfile1.txt

$ panda look Cache::Memcached 
==> Fetching Cache::Memcached
==> Entering /usr/home/christian/perl6-roast-data/rakudo.moar/panda/.panda-work/1420661219_1 with /bin/sh

$ perl6 --target=mbc --output=foo lib/Cache/Memcached.pm 
useless use of 'is rw' on $!debug  in any  at src/Perl6/World.nqp:1844

useless use of 'is rw' on $!no_rehash  in any  at src/Perl6/World.nqp:1844

useless use of 'is rw' on %!stats  in any  at src/Perl6/World.nqp:1844

useless use of 'is rw' on $!namespace  in any  at src/Perl6/World.nqp:1844

useless use of 'is rw' on $!namespace_len  in any  at /home/christian/bin/rakudo.moar/languages/nqp/lib/Perl6/World.moarvm:1

useless use of 'is rw' on @!servers  in any  at /home/christian/bin/rakudo.moar/languages/nqp/lib/Perl6/World.moarvm:1

useless use of 'is rw' on $!active  in any  at /home/christian/bin/rakudo.moar/languages/nqp/lib/Perl6/World.moarvm:1

useless use of 'is rw' on $!pref_ip  in any  at /home/christian/bin/rakudo.moar/languages/nqp/lib/Perl6/World.moarvm:1

useless use of 'is rw' on $!bucketcount  in any  at src/Perl6/World.nqp:1844

useless use of 'is rw' on $!_single_sock  in any  at src/Perl6/World.nqp:1844

useless use of 'is rw' on $!connect_timeout  in any  at src/Perl6/World.nqp:1844

useless use of 'is rw' on @!buck2sock  in any  at src/Perl6/World.nqp:1844

===SORRY!=== Error while compiling lib/Cache/Memcached.pm
Variable $!active used where no 'self' is available
at lib/Cache/Memcached.pm:963
------>     return if ! $!active⏏ || $!readonly;
$ echo $?
1