Class marked as unused when used in a static block

🔎 Search Terms

class unused static field block

🕗 Version & Regression Information

• This is the behavior in every version I tried

⏯ Playground Link

https://www.typescriptlang.org/play?ts=5.5.0-dev.20240303#code/DYUwLgBAQsCu4AsD2SwBEQDcCWBjEA+rgE4gCGYIA3ALABQuwZAzs9HIiulniBAN70IEAMTYAJgEIAXBGZhi2AHYBzWnSFywFPKLLBgSAO4BhJEvnFYuSAF4IAM33Nq9TQAdFmCn1znL1mBIxAAUAJQCmsLYDhAhkjDwYMioGDj4AHQi+oam-gqBEYJ0wqUQycTGEEogRhAAosSVoQBEAJpIsBC4ZEpKqBDK8r1g2D7lCNhsjCxs4tikNsAAni1h6mUAvprbGiVaOriR+8KJnKk8+ESk4-YhErKWyioRtgB8x2WnHMlcabxZHLGMwWAo2CD2AquE6lPygiDiS58ew1OpnX4XdIgcIbL7olLcLGAgzA-JWcH2JzAFy4sqIolicQQwbiWmlUhgWDEJQIpFsza43aaFTgFnhT7s8BcnnJKZZCSC+hCuigSBkZkAJnU9HxfyR13IlBCLTIZDW2roIAAHu5gpB+JsgA

💻 Code

let BluethootDevice_create;
class BluethootDevice {
  #id!: string;

  static #allowConstruct = false;

  private constructor() {
    if (!BluethootDevice.#allowConstruct) {
      throw new Error("You cannot instantiate this class directly");
    }
  }

  static {
    BluethootDevice_create = (id: string) => {
      BluethootDevice.#allowConstruct = true;
      const device = new BluethootDevice();
      BluethootDevice.#allowConstruct = false;
      device.#id = id;
      return device;
    };
  }

  get id() {
    return this.#id;
  }
}

let a = 2;

BluethootDevice_create("aa");

export {}

🙁 Actual behavior

The class BluethootDevice is marked as unused, but it's used by the BluethootDevice_create function

🙂 Expected behavior

BluethootDevice should not be marked as unused

Additional information about the issue

No response

Start with the linked TypeScript Playground reproduction and confirm that the class is reported as unused when referenced inside its static block. Trace the unused-symbol diagnostic for this pattern, then add coverage for the example and verify that the unused warning is no longer emitted.