FIR checker: report CAPTURED_VAL_INITIALIZATION

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/dfa/cfg/CfgUtils.kt

@@ -0,0 +1,11 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.fir.resolve.dfa.cfg
+
+import org.jetbrains.kotlin.contracts.description.EventOccurrencesRange
+
+val EventOccurrencesRange?.isInPlace: Boolean
+    get() = this != null

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/dfa/cfg/ControlFlowGraphBuilder.kt

@@ -306,9 +306,6 @@ class ControlFlowGraphBuilder {
             else -> false
         }
 
-    private val EventOccurrencesRange?.isInPlace: Boolean
-        get() = this != null
-
     fun exitAnonymousFunction(anonymousFunction: FirAnonymousFunction): Triple<FunctionExitNode, PostponedLambdaExitNode?, ControlFlowGraph> {
         val symbol = anonymousFunction.symbol
         val exitNode = exitsOfAnonymousFunctions.remove(symbol)!!.also {