Import names from singleton but show CANNOT_IMPORT_ON_DEMAND_FROM_SINGLETON error

compiler/testData/diagnostics/tests/imports/ImportFromObject.kt

@@ -0,0 +1,20 @@
+// FILE: a.kt
+package a
+
+object O {
+    class A
+    object B
+
+    fun bar() {}
+}
+
+// FILE: b.kt
+package b
+
+import a.<!CANNOT_IMPORT_ON_DEMAND_FROM_SINGLETON!>O<!>.*
+
+fun test() {
+    A()
+    B
+    <!UNRESOLVED_REFERENCE!>bar<!>()
+}