SEGV when run with MVM_SPESH_NODELAY=1 and MVM_SPESH_BLOCKING=1

gistfile1.txt

use Test;
my class Foo::Bar::Ber {
    has $.a; has $.b; has $.c;
    method new ($a?, :$b, :$c) { self.bless: :$a, :$b, :$c }
}

my Foo::Bar::Ber constant foo3 .= new;
Foo::Bar::Ber.new;