[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/smartCasts/intersectionScope/unstableSmartCast.fir.kt

@@ -0,0 +1,38 @@
+// !WITH_NEW_INFERENCE
+// !CHECK_TYPE
+
+interface A {
+    fun foo(): CharSequence?
+    fun baz(x: Any) {}
+}
+
+interface B {
+    fun foo(): String
+    fun baz(x: Int): String =""
+    fun baz(x: Int, y: Int) {}
+
+    fun foobar(): CharSequence?
+}
+
+interface C {
+    fun foo(): String
+    fun baz(x: Int): String =""
+    fun baz(x: Int, y: Int) {}
+
+    fun foobar(): String
+}
+
+var x: A = null!!
+
+fun test() {
+    x.foo().checkType { _<CharSequence?>() }
+
+    if (x is B && x is C) {
+        x.<!AMBIGUITY!>foo<!>().<!INAPPLICABLE_CANDIDATE!>checkType<!> { <!UNRESOLVED_REFERENCE!>_<!><CharSequence?>() }
+        x.baz("")
+        x.<!AMBIGUITY!>baz<!>(1).<!INAPPLICABLE_CANDIDATE!>checkType<!> { <!UNRESOLVED_REFERENCE!>_<!><Unit>() }
+        x.<!AMBIGUITY!>baz<!>(1, 2)
+
+        x.<!AMBIGUITY!>foobar<!>().<!INAPPLICABLE_CANDIDATE!>checkType<!> { <!UNRESOLVED_REFERENCE!>_<!><String>() }
+    }
+}