This single-file program stored in `test/Main.java`:
```
package test;

import static test.Helper.*;

public class Main {
public static void main(String[] args) {
m();
}
}

class Helper {
static void m() {}
}
```
yields `error: can't find main(String[]) method in class: test.Helper` running via `java test/Main.java` on Java 11 up to 21. Error message for Java 22 reads slightly different: `error: can't find class: Main`.

Workaround: remove `import static test.Helper.*;` and use `Helper.m();` inside Main's main method.