new inference: check also variable instantiation for primitive wrappers (IDEA-127752)

java/java-psi-impl/src/com/intellij/psi/impl/source/resolve/graphInference/InferenceSession.java

@@ -446,7 +446,7 @@ public class InferenceSession {
   }
   
   private static boolean hasPrimitiveWrapperBound(InferenceVariable inferenceVariable) {
-    final InferenceBound[] boundTypes = {InferenceBound.UPPER, InferenceBound.LOWER};
+    final InferenceBound[] boundTypes = {InferenceBound.UPPER, InferenceBound.LOWER, InferenceBound.EQ};
     for (InferenceBound inferenceBound : boundTypes) {
       final List<PsiType> bounds = inferenceVariable.getBounds(inferenceBound);
       for (PsiType bound : bounds) {

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/graphInference/PrimitiveWrapperConditionInReturnConstraint.java

@@ -0,0 +1,15 @@
+class Test {
+  static class TKey<T> {
+  }
+
+  public interface Getter {
+    <T> T getValue(TKey<T> key);
+  }
+
+  static final TKey<Integer> KEY_I = null;
+
+
+  public static void f(Getter getter, TKey<Integer> key) {
+    double d1 = getter.getValue (key);
+  }
+}

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

@@ -192,6 +192,10 @@ public class GraphInferenceHighlightingTest extends LightDaemonAnalyzerTestCase
     doTest();
   }
 
+  public void testPrimitiveWrapperConditionInReturnConstraint() throws Exception {
+    doTest();
+  }
+
   private void doTest() throws Exception {
     doTest(false);
   }