scalar(%h = (1,1,1,1)) should return 4, not 2

scalar(%h = (1,1,1,1)) should return 4, not 2

perldoc perlop says:

    a list assignment in scalar context returns the number of elements
    produced by the expression on the right hand side of the assignment

Behaviour was changed as side effect of
ca65944e8ff8fff6e36ea7476ba807be16cfe2a9 where goal was to fix
return value in list context.