[BUG] Delombok: Combination of @SuperBuilder, @NoArgsConstructur and @Builder.Default does not set default value in generated no-args constructor

[riemenschneider]

Describe the bug
When using the @Builder/@SuperBuilder annotation default field values can be specified directly on the field by using the @Builder.Default annotation. In this case a generated no-args constructor should respect that default. This is working when using @Builder, @NoArgsConstructor and @Builder.Default annotations in combination. When when replacing the @Builder annotation by a @SuperBuilder annotation the default is missing in the generated no-args constructor.

To Reproduce
Download latest and greatest Lombok 1.18.22 jar and delombok the following piece of code:

import lombok.*;
import lombok.experimental.*;

@NoArgsConstructor
@SuperBuilder
public class Test {

	@Builder.Default
	private int index = 1;
	
}

(Store the code in a Java file Test.java and execute java -jar lombok.jar delombok -p Test.java.)

This will produce a delomboked Java class with an empty no-args constructor.

λ java -jar lombok.jar delombok -p Test.java
// Generated by delombok at Thu Dec 02 16:02:34 CET 2021

import lombok.*;

public class Test {
        private int index;

        @java.lang.SuppressWarnings("all")
        private static int $default$index() {
                return 0;
        }


        @java.lang.SuppressWarnings("all")
        public static abstract class TestBuilder<C extends Test, B extends Test.TestBuilder<C, B>> {
                @java.lang.SuppressWarnings("all")
                private boolean index$set;
                @java.lang.SuppressWarnings("all")
                private int index$value;

                @java.lang.SuppressWarnings("all")
                protected abstract B self();

                @java.lang.SuppressWarnings("all")
                public abstract C build();

                /**
                 * @return {@code this}.
                 */
                @java.lang.SuppressWarnings("all")
                public B index(final int index) {
                        this.index$value = index;
                        index$set = true;
                        return self();
                }

                @java.lang.Override
                @java.lang.SuppressWarnings("all")
                public java.lang.String toString() {
                        return "Test.TestBuilder(index$value=" + this.index$value + ")";
                }
        }


        @java.lang.SuppressWarnings("all")
        private static final class TestBuilderImpl extends Test.TestBuilder<Test, Test.TestBuilderImpl> {
                @java.lang.SuppressWarnings("all")
                private TestBuilderImpl() {
                }

                @java.lang.Override
                @java.lang.SuppressWarnings("all")
                protected Test.TestBuilderImpl self() {
                        return this;
                }

                @java.lang.Override
                @java.lang.SuppressWarnings("all")
                public Test build() {
                        return new Test(this);
                }
        }

        @java.lang.SuppressWarnings("all")
        protected Test(final Test.TestBuilder<?, ?> b) {
                if (b.index$set) this.index = b.index$value;
                 else this.index = Test.$default$index();
        }

        @java.lang.SuppressWarnings("all")
        public static Test.TestBuilder<?, ?> builder() {
                return new Test.TestBuilderImpl();
        }

        @java.lang.SuppressWarnings("all")
        public Test() {
        }
}

Expected behavior
The generated no-args constructor should set the field to it's default value (like it is done when using the @Builder annotation).

        @java.lang.SuppressWarnings("all")
        public Test() {
                this.index = Test.$default$index();
        }

Version info (please complete the following information):

• Lombok version
  1.18.22
• Platform
  • Azul Zulu 8 on Windows 10

    λ java -version
    openjdk version "1.8.0_302"
    OpenJDK Runtime Environment (Zulu 8.56.0.21-CA-win64) (build 1.8.0_302-b08)
    OpenJDK 64-Bit Server VM (Zulu 8.56.0.21-CA-win64) (build 25.302-b08, mixed mode)
    

  • Azul Zulu 8 on RHEL 8.5

    $ /opt/CBMS/tools/java/zulu8/bin/java -version
    openjdk version "1.8.0_222"
    OpenJDK Runtime Environment (Zulu 8.40.0.20-SA-linux64) (build 1.8.0_222-b10)
    OpenJDK 64-Bit Server VM (Zulu 8.40.0.20-SA-linux64) (build 25.222-b10, mixed mode)
    

  • Oracle JDK 1.8 on RHEL 8.5

    $ /opt/CBMS/tools/java/jdk1.8/bin/java -version
    java version "1.8.0_181"
    Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
    Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
    

Additional context
When using Lombok as a Java agent the generated code is perfectly fine.

Additionally I have tested with different versions of Lombok. Lombok 1.18.4, 1.18.12 and 1.18.20 produce the same wrong no-args constructor.

[riemenschneider]

Closing this issue since it is a duplicate of #3053 which is resolved in 1.18.24.