Var can be val: correct handling of initialization in lambda #KT-14065 Fixed

idea/src/org/jetbrains/kotlin/idea/inspections/CanBeValInspection.kt

@@ -83,7 +83,7 @@ class CanBeValInspection : AbstractKotlinInspection() {
                     val writeInstructions = pseudocode.collectWriteInstructions(descriptor)
                     if (writeInstructions.isEmpty()) return false // incorrect code - do not report
 
-                    return writeInstructions.none { canReach(it, writeInstructions) }
+                    return writeInstructions.none { it.owner !== pseudocode || canReach(it, writeInstructions) }
                 }
             }
 

idea/testData/inspections/canBeVal/lambdaInitialization.kt

@@ -0,0 +1,9 @@
+fun run(f: () -> Unit) = f()
+
+fun foo() {
+    var a: Int
+
+    run {
+        a = 20
+    }
+}