5.8.2 generates incorrect d.ts for generics in static method

[crimx]

🔎 Search Terms

"5.8.2", "dts", "d.ts", "static", "generic"

🕗 Version & Regression Information

• This changed between versions 5.7.3 and 5.8.2

⏯ Playground Link

https://www.typescriptlang.org/play/?ts=5.8.2#code/KYDwDg9gTgLgBAQwEYGcZQQY3pgNglFOAQQB4AVOAXkQDsBPAGjgFVq76A+OAbwCg4guGACuSXAEtMcNAhhS4UYAgAmEWrnpwA6lHUBzdhWZsaCBpwAUANwS4RwAFxxyASmdlyJ7lW78hAYrAMCJQtHC0Iri4iETm9AJCAL58SUA

💻 Code

export abstract class A<T = any, U = any> {
 public static readonly Fn = <T, U = any>(value: T): A<T, U> => {
 return null as any
 }
}

🙁 Actual behavior

Outputs d.ts(5.8.2):

export declare abstract class A<T = any, U = any> {
 static readonly Fn: <T, U = any>(value: T_1) => A<T_1, U_1>;
}

🙂 Expected behavior

Outputs d.ts(5.7.3):

export declare abstract class A<T = any, U = any> {
 static readonly Fn: <T_1, U_1 = any>(value: T_1) => A<T_1, U_1>;
}

Additional information about the issue

No response

[Andarist]

Bisects to #60234

[jakebailey]

Titian Cernicova-Dragomir (@dragomirtitian) Wesley Wigham (@weswigham)