Support boxing/unboxing for captured vars of inline class types

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2016 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Copyright 2000-2018 JetBrains s.r.o. 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.backend.jvm.codegen
@@ -339,12 +328,13 @@ class ExpressionCodegen(
         val propertyDescriptor = expression.descriptor
 
         val realDescriptor = DescriptorUtils.unwrapFakeOverride(propertyDescriptor)
-        val fieldType = typeMapper.mapType(realDescriptor.original.type)
+        val fieldKotlinType = realDescriptor.original.type
+        val fieldType = typeMapper.mapType(fieldKotlinType)
         val ownerType = typeMapper.mapImplementationOwner(propertyDescriptor)
         val fieldName = propertyDescriptor.name.asString()
         val isStatic = expression.receiver == null // TODO
 
-        return StackValue.field(fieldType, ownerType, fieldName, isStatic, receiverValue, realDescriptor)
+        return StackValue.field(fieldType, fieldKotlinType, ownerType, fieldName, isStatic, receiverValue, realDescriptor)
     }
 
     override fun visitGetField(expression: IrGetField, data: BlockInfo): StackValue {