Temp variable re-usage breaks JS when building into single file

🔎 Search Terms

static

🕗 Version & Regression Information

• This changed between versions 5.2.0-beta and 5.2.1-rc. I found that this issue appeared in 5.2.0-dev.20230805 build, probably caused by merging https://github.com/microsoft/TypeScript/pull/55262

⏯ Playground Link

https://www.typescriptlang.org/play?#code/PTAEGMEMBdwCwHTQM4ChwBtLOaAwjPKAN6qqgUAOArgEYYCW4oy0MToATgKaUD2naAFFOnUAF5QACgCUALlC0+fDN0gA7CQD4S5Cl27RqnTQViI+6kZwEBJddG4nIGABIaAJqs6yA3HoBffz0aeg5WdmZLazsHJ3UXd3UvJwlpeUVlVQ1tXX0DIxNQaE5qbn8KILIqOkZmCOgODz5uZAAlbgArbnBoNOwAT3VmWVzSfJ5CzQAzF2RuQP8AshBQDT5oOCcAWihzJDRMbFwAQXUNrc4zInGasPq2RuYefkEAZT4AW0M4BnUAczSsgUShUak04h0twok2MmjOFyc1ws6g+302f3+SRSPhkFVAVRCtXCjw4ljRP0x2O8QIyoOyEKhehhhjhxVK5UW1VAoTqLFJzGarQ63V6-WQQxGMjGzIKbNmGHmXOWqFW4C+lAYqmKW3moAATKBplrWqA-tA+GsWJjtZZuKAAO4MTagABEKGYe3gBzW502Oy9iBQoG22z41GgADETcVWtAEJ1cKHPnwPNRted1PbQ2xOP9DKBWvqAAwARgA7K6gA

💻 Code

// catch.ts
class Catch {

   public static reportErr = (): boolean => {
    return Catch.onErrorInternalHandler();
  };

  public static onErrorInternalHandler = (): boolean => {
    return true;
  };

  public static doesReject = async () => {
    return false
  };
}

// another-catch.ts
class AnotherCatch {
   public static reportSomething = (): boolean => {
    return AnotherCatch.onSomethingHandler();
  };

  public static onSomethingHandler = (): boolean => {
    return true;
  };

  public static doesReject = async () => {
    return false
  };
}

// compile these 2 files into a single one with "tsc catch.ts another-catch.ts --outFile test.js --module none --target es2017"

🙁 Actual behavior

In compiled JS it converts to:

var _a;
class Catch {
}
_a = Catch;
Catch.reportErr = () => {
    return _a.onErrorInternalHandler();
};
Catch.onErrorInternalHandler = () => {
    return true;
};
Catch.doesReject = async () => {
    return false;
};
var _a;
class AnotherCatch {
}
_a = AnotherCatch;
AnotherCatch.reportSomething = () => {
    return _a.onSomethingHandler();
};
AnotherCatch.onSomethingHandler = () => {
    return true;
};
AnotherCatch.doesReject = async () => {
    return false;
};

Which leads to _a.onErrorInternalHandler is not a function error when trying to perform Catch.reportErr() later in the code.

🙂 Expected behavior

In 5.2.0-beta it compiled to

var _a;
class Catch {
}
_a = Catch;
Catch.reportErr = () => {
    return Catch.onErrorInternalHandler();
};

And it worked well.

Additional information about the issue

No response

Reproduce the issue with catch.ts and another-catch.ts using tsc catch.ts another-catch.ts --outFile test.js --module none --target es2017, then inspect the generated test.js. Compare the emitted temporary-variable handling with the expected output and verify that both static methods work when the files are bundled into one output file.