Interface and type with same shape treated diffrently when comapring to Record<string, unknown>

[kbrilla]

Bug Report

🔎 Search Terms

interface, type, Record<string, unknown>

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about interfaces

⏯ Playground Link

Playground link with relevant code

💻 Code

function foo<T extends Record<string, unknown>>(param: T) {}

type type1 = {a: string};

interface interface1 {
    a: string;
    };

function tWrapper(value: type1) {
    foo(value);
}

function iWrapper(value: interface1) {
    foo(value); //error 
   /*
     Argument of type 'interface1' is not assignable to parameter of type 'Record<string, unknown>
     Index signature for type 'string' is missing in type 'interface1'.(2345)
   */ 
}

const i: interface1 = {a: 'interface'};
const t: type1 = {a: 'type'};

tWrapper(t);
tWrapper(i);
iWrapper(t);
iWrapper(i);

🙁 Actual behavior

Even though type1 and interface1 have the same shape and variables of their types can be used interchangeably as see that there are no errors in

tWrapper(t);
tWrapper(i);
iWrapper(t);
iWrapper(i);

🙂 Expected behavior

interface and type with same shape works the same

[MartinJohns]

This is working as intended. interface and type are not interchangeably.

Duplicate of #42825. See also #15300 (comment).

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.