Don't register safe cast type info for unstable values

Important: to be removed in 1.3 So #KT-20752 Fixed
2017-10-13 14:43:42 +03:00
parent 8ae3dbdcfc
commit a55c6f0c95
7 changed files with 162 additions and 6 deletions
@@ -0,0 +1,25 @@
+// !LANGUAGE: +SafeCastCheckBoundSmartCasts
+// See KT-20752
+
+class Unstable {
+    val first: String? get() = null
+}
+
+class StringList {
+    fun remove(s: String) = s
+}
+
+fun StringList.remove(s: String?) = s ?: ""
+
+fun foo(list: StringList, arg: Unstable) {
+    list.remove(arg.first)
+    if (arg.first <!USELESS_CAST!>as? String<!> != null) {
+        // Ideally should have smart cast impossible here
+        list.remove(arg.first)
+    }
+    val s = arg.first <!USELESS_CAST!>as? String<!>
+    if (s != null) {
+        // Ideally should have smart cast impossible here
+        list.remove(arg.first)
+    }
+}