Symbols disallowed as object keys

[ghost]

TypeScript Version: 4.0.0-dev.20200725

Search Terms:
Symbols as object keys

Code

type symbolKey = {
    [key: symbol]: any
};

Expected behavior:
The code compiles without error.

Actual behavior:
TSC throws an error disallowing symbols to be used as object keys.

Playground Link: https://www.typescriptlang.org/play?ts=4.0.0-dev.20200725#code/C4TwDgpgBAziC2AjA9gGwNIRFAvFA3gFBQlQDaA1lgFywIqoC6tAhgHYiEC+A3EA

Related Issues: Couldn't find anything related

Symbols were introduces with the primary purpose of being used as object keys, and are still primarily, if not only, used with that purpose. To not be usable as keys makes no sense whatsoever. They can be used on any object type too, array, generic object, map, Element, etc.

[SancheZz]

#26797

[kitsonk]

Duplicate of #1863

[ghost]

Yeah okay, I'm a bit late.