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

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();
+  }
+}