Completion of functions parameters works incorrectly

[ileasile]

Check following scenarios:

1. Completion for extensions

fun String.f(bar: Int) = bar
"some".f(b|< // 'bar'

2. Completion inside function bodies

foo dontCompleteMe(foo: Int, bar: String) {
    val foo2 = ""
    val a = f|< // 'foo2' and 'foo'
}

3. Constructors completion

class C(val xyz: Int)
C(x|< // 'xyz'

[ileasile]

All cases work correctly in the latest master