FIR CFG: handle loops and try/catch when analyzing smartcasts in lambdas

See KT-50092
2022-09-30 14:29:55 +03:00
parent d054617b8e
commit a9ae1fcdf9
8 changed files with 339 additions and 116 deletions
@@ -0,0 +1,55 @@
+// ISSUE: KT-50092
+
+fun test1() {
+    var x: String? = "..."
+    var lambda: (() -> Int)? = null
+    for (i in 1..2) {
+        when (i) {
+            2 -> x = null
+            1 -> if (x != null) lambda = { <!DEBUG_INFO_SMARTCAST!>x<!>.length } // bad
+        }
+    }
+    lambda?.invoke()
+}
+
+fun test2() {
+    var x: String? = "..."
+    if (x != null) {
+        val lambda = { <!SMARTCAST_IMPOSSIBLE!>x<!>.length } // bad
+        while (false) return
+        x = null
+        lambda()
+    }
+}
+
+fun test3() {
+    var x: String? = "asd"
+    if (x != null) {
+        var lambda: (() -> Int)? = null
+        try {
+            lambda = { <!SMARTCAST_IMPOSSIBLE!>x<!>.length } // bad
+            if (true) throw RuntimeException("...")
+            return
+        } catch (e: Exception) {
+            x = null
+            lambda?.invoke()
+        } finally {
+            x = null
+            lambda?.invoke()
+        }
+    }
+}
+
+fun test4() {
+    var x: String? = "..."
+    if (x != null) {
+        var lambda: (() -> Int)? = <!VARIABLE_WITH_REDUNDANT_INITIALIZER!>null<!>
+        while (true) {
+            lambda = { <!SMARTCAST_IMPOSSIBLE!>x<!>.length } // bad
+            if (true) break
+            return
+        }
+        x = null
+        lambda?.invoke()
+    }
+}