assignment chain cause compatibility issue

[HerrCai0907]

Bug description

In Typescript, it will print

set 1
set 1

But In Assemblyscript, it will print

set 1
get
set 123

Which will cause compatibility issue when port code.

class X {
  get y() {
    console.log("get");
    return 123;
  }
  set y(z) {
    console.log("set", z);
  }
}

let x = new X();
x.y = x.y = 1;

Steps to reproduce

compile and execute below code in both ts and as

AssemblyScript version

v0.27.x