After fixing simplify in 2.10.2, the simplification for nested if statements seems to become wrong.

Original Code

function foo () {
  if (bar) {
    if (baz) {
      const a = aa()
    }
  } else {
    bb()
  }
}

Expected Behavior

It should be and is translated in 2.10.1 to:

function foo () {
  if (bar) {
    if (baz) {
      const a = aa();
    }
  } else
    bb();
}

Current Behavior

But it is translated in 2.10.2 to:

function foo () {
  if (bar)
    if (baz) {
      const a = aa();
    }
  else
    bb();
}

The missing braces in the then branch of the first if makes the else branch matches to the second if. As a result, the program goes wrong.

And interestingly, if I use ES5’s var to declare the variable, everything’s good. The let and const would result in a bad code.

Steps to Reproduce

Just try above code with default configuration.

Your Environment

• Obfuscator version used: 2.10.2
• Node version used: 12.16.1

Minimal working example that will help to reproduce issue

See above.