Invalid error on computed property name using a variable with the same name as a constructor parameter of that class

[ajafff]

TypeScript Version: 4.1.3

Search Terms:

Expected behavior:

No error. The downlevel emit is fine, so this won't give any unexpected behavior at runtime.

Actual behavior:

Initializer of instance member variable '[a]' cannot reference identifier 'a' declared in the constructor.

Code

const a = Symbol();
class C {
    [a] = 1;
    constructor(a) {}
}

Output

"use strict";
var _a;
const a = Symbol();
class C {
    constructor(a) {
        this[_a] = 1;
    }
}
_a = a;

Compiler Options

{
  "compilerOptions": {
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "strictBindCallApply": true,
    "noImplicitThis": true,
    "noImplicitReturns": true,
    "alwaysStrict": true,
    "esModuleInterop": true,
    "declaration": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "moduleResolution": 2,
    "target": "ES2017",
    "jsx": "React",
    "module": "ESNext"
  }
}

Playground Link: Provided