add cast to disambiguate method calls when replacing their argument with null (IDEA-126466)

java/java-tests/testData/inspection/dataFlow/fixture/ReportConstantReferences.java

@@ -1,13 +1,15 @@
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 class Test {
-  private void test2(@NotNull Object bar) {
+  private void test2(@NotNull Object bar) {}
+
+  void println(@Nullable Object o) {}
 
-  }
   private Object test(Object foo, Object bar) {
     if (foo == null) {
-      System.out.println(<warning descr="Value 'foo' is always 'null'"><caret>foo</warning>);
-      System.out.println(<warning descr="Value 'foo' is always 'null'">foo</warning>);
+      println(<warning descr="Value 'foo' is always 'null'"><caret>foo</warning>);
+      println(<warning descr="Value 'foo' is always 'null'">foo</warning>);
       return <warning descr="Expression 'foo' might evaluate to null but is returned by the method which is not declared as @Nullable">foo</warning>;
     }
     if (bar == null) {

java/java-tests/testData/inspection/dataFlow/fixture/ReportConstantReferences_OverloadedCall.java

@@ -0,0 +1,14 @@
+import org.jetbrains.annotations.Nullable;
+
+class Test {
+  void method(@Nullable String o) {}
+
+  void method(@Nullable Integer o) {}
+
+  private void test(String foo) {
+    if (foo == null) {
+      method(<warning descr="Value 'foo' is always 'null'"><caret>foo</warning>);
+    }
+  }
+
+}

java/java-tests/testData/inspection/dataFlow/fixture/ReportConstantReferences_OverloadedCall_after.java

@@ -0,0 +1,14 @@
+import org.jetbrains.annotations.Nullable;
+
+class Test {
+  void method(@Nullable String o) {}
+
+  void method(@Nullable Integer o) {}
+
+  private void test(String foo) {
+    if (foo == null) {
+      method(<caret>(String) null);
+    }
+  }
+
+}

java/java-tests/testData/inspection/dataFlow/fixture/ReportConstantReferences_after.java

@@ -1,13 +1,15 @@
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 class Test {
-  private void test2(@NotNull Object bar) {
+  private void test2(@NotNull Object bar) {}
+
+  void println(@Nullable Object o) {}
 
-  }
   private Object test(Object foo, Object bar) {
     if (foo == null) {
-      System.out.println(<caret>null);
-      System.out.println(foo);
+      println(<caret>null);
+      println(foo);
       return foo;
     }
     if (bar == null) {