// Test case for Issue 523:
// https://github.com/typetools/checker-framework/issues/523

import org.checkerframework.checker.lock.qual.*;

class Issue523 {
    static class MyClass {
        Object field;
    }

    static final @GuardedBy("<self>") MyClass m = new MyClass();

    static void foo() {
        Thread t =
                new Thread() {
                    public void run() {
                        synchronized (m) {
                            m.field = new Object();
                        }
                    }
                };
    }
}