guess expected type like for completion if on the left side of assignment to functional expression which provides in this case no expected type (IDEA-169382)

java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/CreateFromUsageUtils.java

@@ -575,7 +575,10 @@ public class CreateFromUsageUtils {
       PsiElement parent = expr.getParent();
 
       if (!(parent instanceof PsiReferenceExpression)) {
-        ExpectedTypeInfo[] someExpectedTypes = ExpectedTypesProvider.getExpectedTypes(expr, PsiUtil.skipParenthesizedExprUp(parent) instanceof PsiExpressionList);
+        boolean isAssignmentToFunctionalExpression = PsiUtil.isOnAssignmentLeftHand(expr) &&
+                                                     ((PsiAssignmentExpression)PsiUtil.skipParenthesizedExprUp(parent)).getRExpression() instanceof PsiFunctionalExpression;
+        boolean forCompletion = PsiUtil.skipParenthesizedExprUp(isAssignmentToFunctionalExpression ? parent.getParent() : parent) instanceof PsiExpressionList;
+        ExpectedTypeInfo[] someExpectedTypes = ExpectedTypesProvider.getExpectedTypes(expr, forCompletion);
         if (someExpectedTypes.length > 0) {
           Arrays.sort(someExpectedTypes, (o1, o2) -> compareExpectedTypes(o1, o2, expression));
           types.add(someExpectedTypes);

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/createLocalFromUsage/afterAssignmentToFunctionalExpressionInArgumentsList.java

@@ -0,0 +1,10 @@
+// "Create local variable 'lf'" "true"
+import java.util.function.Function;
+
+class Main2 {
+    void f(Function<String, String> g) {}
+    {
+        Function<String, String> lf;
+        f(lf = c -> c);
+    }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/createLocalFromUsage/beforeAssignmentToFunctionalExpressionInArgumentsList.java

@@ -0,0 +1,9 @@
+// "Create local variable 'lf'" "true"
+import java.util.function.Function;
+
+class Main2 {
+    void f(Function<String, String> g) {}
+    {
+        f(l<caret>f = c -> c);
+    }
+}