checker/tests/nullness/java8/lambda/FinalLocalVariables.java

// Test enclosing final local variables

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

interface FunctionLE<T extends @Nullable Object, R> {
  R apply(T t);
}

class LambdaEnclosing {

  // Test static initializer
  static {
    String local1 = "";
    String local2 = null;
    FunctionLE<String, String> f0 =
        s -> {
          local1.toString();
          // :: error: (dereference.of.nullable)
          local2.toString();
          return "";
        };
  }

  // Test instance initializer
  {
    String local1 = "";
    String local2 = null;
    FunctionLE<String, String> f0 =
        s -> {
          local1.toString();
          // :: error: (dereference.of.nullable)
          local2.toString();
          return "";
        };
  }

  FunctionLE<String, String> functionField =
      s -> {
        String local1 = "";
        String local2 = null;
        FunctionLE<String, String> f0 =
            s2 -> {
              local1.toString();
              // :: error: (dereference.of.nullable)
              local2.toString();
              return "";
            };
        return "";
      };

  void context() {
    String local1 = "";
    String local2 = null;

    FunctionLE<String, String> f1 =
        s -> {
          local1.toString();
          // :: error: (dereference.of.nullable)
          local2.toString();
          class Inner {

            void context2() {
              String local3 = "";
              String local4 = null;

              FunctionLE<String, String> f2 =
                  s2 -> {
                    local1.toString();
                    local2.toString();
                    local3.toString();
                    // :: error: (dereference.of.nullable)
                    local4.toString();

                    return "";
                  };
            }
          }

          new Object() {

            @Override()
            public String toString() {
              String local3 = "";
              String local4 = null;

              FunctionLE<String, String> f2 =
                  s2 -> {
                    local1.toString();
                    local2.toString();
                    local3.toString();
                    // :: error: (dereference.of.nullable)
                    local4.toString();

                    return "";
                  };
              return "";
            }
          }.toString();

          return "";
        };
  }
}