Personally I've got one version of each stable line from 5.6.x to 5.16.x for testing purposes. I do nearly all development on 5.16.2 though. (I haven't seen a compelling reason to go 5.16.3 given that 5.18.0 will be out Real Soon Now.)

package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name

In reply to Re^2: Building Perl 5.10 failure by tobyink
in thread Building Perl 5.10 failure by tqisjim

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