@CheckForNull and @Nonnull not working within lambdas

[dylanwatsonsoftware]

Null pointer de-reference checks do not appear to be working within Java 8 lambdas.

Anonymous classes work fine but converting these to lambdas effectively suppresses any warnings.

See below for an example test case:

package sfBugsNew;

import javax.annotation.CheckForNull;
import edu.umd.cs.findbugs.annotations.ExpectWarning;

/**
 */
public class Bug {

  /**
   * @return may be null
   */
  @CheckForNull
  public static String methodThatMightReturnNull() {
    if (Boolean.getBoolean("test")) {
      return null;
    }

    return "test";
  }

  /**
   */
  @ExpectWarning("NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE")
  public void testNPLambda() {
    Runnable lambda = () -> {
      String maybeNull = methodThatMightReturnNull();

      // would expect findbugs warning about possible null dereferencing here
      boolean empty = maybeNull.isEmpty();
      System.out.println(empty);
    };
    lambda.run();
  }

}

[jsotuyod]

@lotsabackscatter this one is fixed on master branch of Spotbugs, will be included in the next release (3.1.0).

Thanks for the report.

[iloveeclipse]

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