Migrated attachment for Guice issue 757, comment 0

Java8LambdaIssue.java

import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Provides;

import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.function.Supplier;

public final class Java8LambdaIssue {
    public static void main(String[] args) {
        Injector injector = Guice.createInjector(new LambdaIssueModule());

        Executor executor = injector.getInstance(Executor.class);
    }

    private static class LambdaIssueModule extends AbstractModule {
        @Override
        protected void configure() { }

        @Provides
        public Executor createExecutor() {
            if (returnTrue()) {
                throw new IllegalStateException("Something went wrong");
            }
            // NB: the following code will not be executed
            Supplier<String> supplier = () -> "The presence of this lambda causes Guice's exception handling to fail";
            // commenting out the above lambda allows Guice's error handling to correctly report the IllegalStateException
            return Executors.newSingleThreadExecutor();
        }
    }

    /** Avoid dead code elimination by javac. */
    private static boolean returnTrue() {
        return Boolean.parseBoolean("true");
    }
}