-$x->{a} ='b' # [ keys %$x ] # '', [ 'a' ], { a => 'b' }
-$x->{a} ='b' # [ keys %$x ] # '', [ 'a' ], { a => 'b' } #
-$x->{a} ='b' # [ keys %$x ] # '', [ 'a' ], { a => 'b' } # +fetch
-$x->{a} ='b' # [ keys %$x ] # '', [ 'a' ], { a => 'b' } # +exists +delete +store
+$x->{a} = 1 # [ keys %$x ] # '', [ 'a' ], { a => 1 }
+$x->{a} = 1 # [ keys %$x ] # '', [ 'a' ], { a => 1 } #
+$x->{a} = 1 # [ keys %$x ] # '', [ 'a' ], { a => 1 } # +fetch
+$x->{a} = 1 # [ keys %$x ] # '', [ 'a' ], { a => 1 } # +exists +delete +store