Tuple array defined in interface isn't recognized

[nugaon]

Bug Report

🔎 Search Terms

tuple array interface recognized

🕗 Version & Regression Information

4.1.3

• This is the behavior in every version I tried
• I was unable to test this on prior versions because I didn't want to (just kidding I tried out in playground versions).

⏯ Playground Link

Playground link with relevant code

💻 Code

type Conflict = [string, string]

interface IConflict {
  conflicts: Conflict[]
}

class ConflictClass implements IConflict {
  conflicts = [['foo', 'bar']]
}

🙁 Actual behavior

It doesn't recognize the correct touple array definition at the class property initialization.

Error message:

Property 'conflicts' in type 'ConflictClass' is not assignable to the same property in base type 'IConflict'.
Type 'string[][]' is not assignable to type 'Conflict[]'.
Type 'string[]' is not assignable to type 'Conflict'.
Target requires 2 element(s) but source may have fewer.ts(2416)

🙂 Expected behavior

It does.

[MartinJohns]

Duplicate of #10570.

[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.