ensure bounds are promoted on derived type otherwise bounds from super could appear on unbounded wildcards (IDEA-162882)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting8/BoundsPromotionForDerivedType.java

@@ -0,0 +1,23 @@
+
+import java.util.Collection;
+
+interface NumberCollection<N extends Number> extends Collection<N> {
+}
+
+interface IntegerCollection<I extends Integer> extends NumberCollection<I> {}
+interface IntegerCollection1<I extends Integer, L extends I> extends NumberCollection<L> {}
+
+class Test {
+  <T extends Number, C extends NumberCollection<? extends T>> Collection<T> filter(Collection<C> input) {
+    return null;
+  }
+
+  public void foo(Collection<IntegerCollection<?>> input) {
+    Collection<Integer> filtered = filter(input);
+  }
+
+  public void foo1(Collection<IntegerCollection1<?, ?>> input) {
+    Collection<Integer> filtered = filter(input);
+  }
+}
+

java/java-tests/testSrc/com/intellij/codeInsight/daemon/lambda/GenericsHighlighting8Test.java

@@ -21,7 +21,6 @@ import com.intellij.codeInspection.deadCode.UnusedDeclarationInspection;
 import com.intellij.codeInspection.uncheckedWarnings.UncheckedWarningLocalInspection;
 import com.intellij.codeInspection.unusedImport.UnusedImportLocalInspection;
 import com.intellij.openapi.projectRoots.JavaSdkVersion;
-import com.intellij.openapi.projectRoots.Sdk;
 import com.intellij.openapi.roots.LanguageLevelProjectExtension;
 import com.intellij.pom.java.LanguageLevel;
 import com.intellij.testFramework.IdeaTestUtil;
@@ -1009,4 +1008,8 @@ public class GenericsHighlighting8Test extends LightDaemonAnalyzerTestCase {
   public void testTypeParameterBoundsWithSubstitutionWhenMethodHierarchyIsChecked() throws Exception {
     doTest();
   }
+
+  public void testBoundsPromotionForDerivedType() throws Exception {
+    doTest();
+  }
 }