Given the following test case:

import java.lang.annotation.*;

@Anno(req = true)
@Anno()
public class CannotCompileRepeatedAnnoTest {
}

@Repeatable(Container.class)
@interface Anno {
    boolean req() default false;
}

@interface Container{
    Anno[] value();
}

If it's compiled with javac:
$ javac CannotCompileRepeatedAnnoTest.java

javac generates the following error:

CannotCompileRepeatedAnnoTest.java:34: error: incompatible types: int cannot be converted to boolean
@Anno(req = true)
^
1 error