method references with qualifier with captured wildcard type: retrieve upper bound as it is done for method calls

java/java-psi-api/src/com/intellij/psi/PsiMethodReferenceUtil.java

@@ -122,7 +122,13 @@ public class PsiMethodReferenceUtil {
     PsiSubstitutor substitutor = PsiSubstitutor.EMPTY;
     final PsiExpression expression = methodReferenceExpression.getQualifierExpression();
     if (expression != null) {
-      final PsiType expressionType = replaceArrayType(expression.getType(), expression);
+      PsiType expressionType = expression.getType();
+      if (expressionType instanceof PsiCapturedWildcardType) {
+        expressionType = ((PsiCapturedWildcardType)expressionType).getUpperBound();
+      }
+      else {
+        expressionType = replaceArrayType(expressionType, expression);
+      }
       PsiClassType.ClassResolveResult result = PsiUtil.resolveGenericsClassInType(expressionType);
       containingClass = result.getElement();
       if (containingClass != null) {

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/newMethodRef/QualifierOfCapturedWildcardType.java

@@ -0,0 +1,11 @@
+
+final class Test {
+  static <T> T create(Iterable<? extends T> iterable) {
+    return null;
+  }
+
+  public static <T> void testError(Iterable<? extends T> iterable) {
+    Runnable r = create(iterable)::toString;
+  }
+
+}

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

@@ -482,6 +482,10 @@ public class NewMethodRefHighlightingTest extends LightDaemonAnalyzerTestCase {
     doTest();
   }
 
+  public void testQualifierOfCapturedWildcardType() throws Exception {
+    doTest();
+  }
+
   private void doTest() {
     doTest(false);
   }