Function parameter gets optimized away when used as the default of a named parameter only

[Stefan Sechelmann]

Define the following function:
f = function(a){ (function({aa = a}){ console.log('result: ' + aa); })({}); }

--------
f(42)
expected: 
result: 42
got: 
no log at all

--------
f(42)
f(42)
expected:
result: 42
result: 42
got:
result: 42

[Stefan Sechelmann]

Seems to work now.