Change parameter type: Make parameter type nullable (instead of Nothing?) if null is passed as an argument

#KT-6634 Fixed

idea/src/org/jetbrains/kotlin/idea/quickfix/QuickFixFactoryForTypeMismatchError.java

@@ -152,7 +152,9 @@ public class QuickFixFactoryForTypeMismatchError extends JetIntentionActionsFact
             ValueArgument valueArgument = CallUtilPackage.getValueArgumentForExpression(resolvedCall.getCall(), argumentExpression);
             if (valueArgument != null) {
                 JetParameter correspondingParameter = QuickFixUtil.getParameterDeclarationForValueArgument(resolvedCall, valueArgument);
-                JetType valueArgumentType = context.get(BindingContext.EXPRESSION_TYPE, valueArgument.getArgumentExpression());
+                JetType valueArgumentType = diagnostic.getFactory() == Errors.NULL_FOR_NONNULL_TYPE
+                                            ? expressionType
+                                            : context.get(BindingContext.EXPRESSION_TYPE, valueArgument.getArgumentExpression());
                 if (correspondingParameter != null && valueArgumentType != null) {
                     actions.add(new ChangeParameterTypeFix(correspondingParameter, valueArgumentType));
                 }

idea/testData/quickfix/typeMismatch/afterNullArgumentForNonNullParameter.kt

@@ -0,0 +1,8 @@
+// "Change parameter 's' type of primary constructor of class 'Foo' to 'String?'" "true"
+class Foo(s: String?) {
+
+}
+
+fun test() {
+    Foo(null)
+}

idea/testData/quickfix/typeMismatch/beforeNullArgumentForNonNullParameter.kt

@@ -0,0 +1,8 @@
+// "Change parameter 's' type of primary constructor of class 'Foo' to 'String?'" "true"
+class Foo(s: String) {
+
+}
+
+fun test() {
+    Foo(<caret>null)
+}

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java

@@ -4322,6 +4322,12 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
             doTest(fileName);
         }
 
+        @TestMetadata("beforeNullArgumentForNonNullParameter.kt")
+        public void testNullArgumentForNonNullParameter() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/quickfix/typeMismatch/beforeNullArgumentForNonNullParameter.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("beforePropertyTypeMismatch.kt")
         public void testPropertyTypeMismatch() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/quickfix/typeMismatch/beforePropertyTypeMismatch.kt");