IDEA-59350 Double completion variance for static imported fields

java/java-impl/src/com/intellij/codeInsight/completion/JavaCompletionUtil.java

@@ -876,9 +876,14 @@ public class JavaCompletionUtil {
 
     boolean mayHighlight = qualifierType != null && (castedQualifierType == null || !qualifierType.isAssignableFrom(castedQualifierType));
 
+    final Set<PsiMember> mentioned = new THashSet<PsiMember>();
     for (CompletionElement completionElement : plainResults) {
       LookupElement item = createLookupElement(completionElement, qualifierType);
       if (item != null) {
+        final Object o = item.getObject();
+        if (o instanceof PsiMember) {
+          mentioned.add((PsiMember)o);
+        }
         set.add(mayHighlight ? highlightIfNeeded(qualifierType, item) : item);
       }
     }
@@ -888,7 +893,7 @@ public class JavaCompletionUtil {
       memberProcessor.processMembersOfRegisteredClasses(matcher, new PairConsumer<PsiMember, PsiClass>() {
         @Override
         public void consume(PsiMember member, PsiClass psiClass) {
-          if (processor.satisfies(member, ResolveState.initial())) {
+          if (!mentioned.contains(member) && processor.satisfies(member, ResolveState.initial())) {
             set.add(memberProcessor.createLookupElement(member, psiClass, true));
           }
         }

java/java-tests/testSrc/com/intellij/codeInsight/completion/NormalCompletionTest.groovy

@@ -763,4 +763,19 @@ public class NormalCompletionTest extends LightFixtureCompletionTestCase {
     assertOrderedEquals myFixture.lookupElementStrings, "final", "float"
   }
 
+  public void testStaticallyImportedFieldsTwice() {
+    myFixture.addClass("""
+      class Foo {
+        public static final int aZOO;
+      }
+    """)
+    myFixture.configureByText("a.java", """
+      import static Foo.*
+      class Bar {{
+        aZ<caret>a
+      }}
+    """)
+    assertOneElement myFixture.completeBasic()
+  }
+
 }