FIR DFA: don't propagate reassignments of loop-scoped vars to outside

2022-12-07 11:16:36 +01:00
parent 06b71f8300
commit a3768b9185
3 changed files with 57 additions and 22 deletions
@@ -66,3 +66,20 @@ fun test5() {
    }
    lambda?.invoke()
 }
+
+fun test6() {
+    var lambda: () -> Unit = { }
+    for (x in 1..10) {
+        var s: String? = null
+        for (y in 1..10) {
+            s = null
+            lambda()
+            s = ""
+            lambda = { <!DEBUG_INFO_SMARTCAST!>s<!>.length } // bad - next iteration will assign s = null
+        }
+
+        if (s != null) {
+            lambda = { <!DEBUG_INFO_SMARTCAST!>s<!>.length } // ok - s about to go out of scope
+        }
+    }
+}