Request type : Enhancement

Rule : no-constant-condition

What version of ESLint are you using?
2.5.1

What parser (default, Babel-ESLint, etc.) are you using?
default

Please show your full configuration:

{
  "rules": {
    "no-constant-condition": 2   // disallow use of constant expressions in conditions
  }
}

What did you do? Please include the actual source code causing the issue.

if(void x){}
if (void x === void x){}

What did you expect to happen?
Error as it is a constant condition

What actually happened?
No error

As discussed in #5228 & #5696