[fixes #2701] fix NPE on customized SuperBuilder with Singular

src/core/lombok/javac/handlers/HandleSuperBuilder.java

@@ -303,7 +303,7 @@ public void handle(AnnotationValues<SuperBuilder> annotation, JCAnnotation ast,
 				if (sd == null) continue;
 				JavacSingularizer singularizer = sd.getSingularizer();
 				if (singularizer == null) continue;
-				if (singularizer.checkForAlreadyExistingNodesAndGenerateError(job.builderType, sd)) {
+				if (singularizer.checkForAlreadyExistingNodesAndGenerateError(job.builderAbstractType, sd)) {
 					bfd.singularData = null;
 				}
 			}

test/transform/resource/after-delombok/SuperBuilderSingularCustomized.java

@@ -0,0 +1,77 @@
+import java.util.Set;
+class SuperBuilderSingularCustomized {
+	private Set<String> foos;
+	public static abstract class SuperBuilderSingularCustomizedBuilder<C extends SuperBuilderSingularCustomized, B extends SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder<C, B>> {
+		@java.lang.SuppressWarnings("all")
+		private java.util.ArrayList<String> foos;
+		public B custom(final String value) {
+			return self();
+		}
+		@java.lang.SuppressWarnings("all")
+		protected abstract B self();
+		@java.lang.SuppressWarnings("all")
+		public abstract C build();
+		@java.lang.SuppressWarnings("all")
+		public B foo(final String foo) {
+			if (this.foos == null) this.foos = new java.util.ArrayList<String>();
+			this.foos.add(foo);
+			return self();
+		}
+		@java.lang.SuppressWarnings("all")
+		public B foos(final java.util.Collection<? extends String> foos) {
+			if (foos == null) {
+				throw new java.lang.NullPointerException("foos cannot be null");
+			}
+			if (this.foos == null) this.foos = new java.util.ArrayList<String>();
+			this.foos.addAll(foos);
+			return self();
+		}
+		@java.lang.SuppressWarnings("all")
+		public B clearFoos() {
+			if (this.foos != null) this.foos.clear();
+			return self();
+		}
+		@java.lang.Override
+		@java.lang.SuppressWarnings("all")
+		public java.lang.String toString() {
+			return "SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder(foos=" + this.foos + ")";
+		}
+	}
+	@java.lang.SuppressWarnings("all")
+	private static final class SuperBuilderSingularCustomizedBuilderImpl extends SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder<SuperBuilderSingularCustomized, SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilderImpl> {
+		@java.lang.SuppressWarnings("all")
+		private SuperBuilderSingularCustomizedBuilderImpl() {
+		}
+		@java.lang.Override
+		@java.lang.SuppressWarnings("all")
+		protected SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilderImpl self() {
+			return this;
+		}
+		@java.lang.Override
+		@java.lang.SuppressWarnings("all")
+		public SuperBuilderSingularCustomized build() {
+			return new SuperBuilderSingularCustomized(this);
+		}
+	}
+	@java.lang.SuppressWarnings("all")
+	protected SuperBuilderSingularCustomized(final SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder<?, ?> b) {
+		java.util.Set<String> foos;
+		switch (b.foos == null ? 0 : b.foos.size()) {
+		case 0: 
+			foos = java.util.Collections.emptySet();
+			break;
+		case 1: 
+			foos = java.util.Collections.singleton(b.foos.get(0));
+			break;
+		default: 
+			foos = new java.util.LinkedHashSet<String>(b.foos.size() < 1073741824 ? 1 + b.foos.size() + (b.foos.size() - 3) / 3 : java.lang.Integer.MAX_VALUE);
+			foos.addAll(b.foos);
+			foos = java.util.Collections.unmodifiableSet(foos);
+		}
+		this.foos = foos;
+	}
+	@java.lang.SuppressWarnings("all")
+	public static SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder<?, ?> builder() {
+		return new SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilderImpl();
+	}
+}

test/transform/resource/after-ecj/SuperBuilderSingularCustomized.java

@@ -0,0 +1,70 @@
+import java.util.Set;
+@lombok.experimental.SuperBuilder class SuperBuilderSingularCustomized {
+  public static abstract class SuperBuilderSingularCustomizedBuilder<C extends SuperBuilderSingularCustomized, B extends SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder<C, B>> {
+    private @java.lang.SuppressWarnings("all") java.util.ArrayList<String> foos;
+    public SuperBuilderSingularCustomizedBuilder() {
+      super();
+    }
+    public B custom(final String value) {
+      return self();
+    }
+    protected abstract @java.lang.SuppressWarnings("all") B self();
+    public abstract @java.lang.SuppressWarnings("all") C build();
+    public @java.lang.SuppressWarnings("all") B foo(final String foo) {
+      if ((this.foos == null))
+          this.foos = new java.util.ArrayList<String>();
+      this.foos.add(foo);
+      return self();
+    }
+    public @java.lang.SuppressWarnings("all") B foos(final java.util.Collection<? extends String> foos) {
+      if ((foos == null))
+          {
+            throw new java.lang.NullPointerException("foos cannot be null");
+          }
+      if ((this.foos == null))
+          this.foos = new java.util.ArrayList<String>();
+      this.foos.addAll(foos);
+      return self();
+    }
+    public @java.lang.SuppressWarnings("all") B clearFoos() {
+      if ((this.foos != null))
+          this.foos.clear();
+      return self();
+    }
+    public @java.lang.Override @java.lang.SuppressWarnings("all") java.lang.String toString() {
+      return (("SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder(foos=" + this.foos) + ")");
+    }
+  }
+  private static final @java.lang.SuppressWarnings("all") class SuperBuilderSingularCustomizedBuilderImpl extends SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder<SuperBuilderSingularCustomized, SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilderImpl> {
+    private SuperBuilderSingularCustomizedBuilderImpl() {
+      super();
+    }
+    protected @java.lang.Override @java.lang.SuppressWarnings("all") SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilderImpl self() {
+      return this;
+    }
+    public @java.lang.Override @java.lang.SuppressWarnings("all") SuperBuilderSingularCustomized build() {
+      return new SuperBuilderSingularCustomized(this);
+    }
+  }
+  private @lombok.Singular Set<String> foos;
+  protected @java.lang.SuppressWarnings("all") SuperBuilderSingularCustomized(final SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder<?, ?> b) {
+    super();
+    java.util.Set<String> foos;
+    switch (((b.foos == null) ? 0 : b.foos.size())) {
+    case 0 :
+        foos = java.util.Collections.emptySet();
+        break;
+    case 1 :
+        foos = java.util.Collections.singleton(b.foos.get(0));
+        break;
+    default :
+        foos = new java.util.LinkedHashSet<String>(((b.foos.size() < 0x40000000) ? ((1 + b.foos.size()) + ((b.foos.size() - 3) / 3)) : java.lang.Integer.MAX_VALUE));
+        foos.addAll(b.foos);
+        foos = java.util.Collections.unmodifiableSet(foos);
+    }
+    this.foos = foos;
+  }
+  public static @java.lang.SuppressWarnings("all") SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder<?, ?> builder() {
+    return new SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilderImpl();
+  }
+}

test/transform/resource/before/SuperBuilderSingularCustomized.java

@@ -0,0 +1,9 @@
+import java.util.Set;
+@lombok.experimental.SuperBuilder
+class SuperBuilderSingularCustomized {
+	@lombok.Singular private Set<String> foos;
+    public static abstract class SuperBuilderSingularCustomizedBuilder<C extends SuperBuilderSingularCustomized, B extends SuperBuilderSingularCustomized.SuperBuilderSingularCustomizedBuilder<C, B>> {
+        public B custom(final String value) {
+            return self(); 
+        }
+    }}