This is a regression I discovered while re-testing the old GRECLIPSE-1772.

Consider the following:

package c
class MyBean {
	String foo
	void setBar(String bar) {
		foo = bar.toUpperCase()
	}
}

And:

package c
class ConstructorTest {
	static main(args) {
		MyBean b = new MyBean(|)
	}
}

Invoke code assist at "|": the property MyBean.bar is not suggested as a possible map-style constructor argument, only MyBean.foo is.

Also, I personally think that the code assist should not automatically add the trailing ",", I would find more comfortable to decide myself if I really need a comma (to enter another key-value pair).