IR: make IrClassReference.classType mutable

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/IrClassReference.kt

@@ -21,5 +21,5 @@ import org.jetbrains.kotlin.ir.types.IrType
 
 abstract class IrClassReference : IrDeclarationReference() {
     abstract override val symbol: IrClassifierSymbol
-    abstract val classType: IrType
+    abstract var classType: IrType
 }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrClassReferenceImpl.kt

@@ -26,7 +26,7 @@ class IrClassReferenceImpl(
     override val endOffset: Int,
     override var type: IrType,
     override val symbol: IrClassifierSymbol,
-    override val classType: IrType
+    override var classType: IrType
 ) : IrClassReference() {
     override fun <R, D> accept(visitor: IrElementVisitor<R, D>, data: D): R =
         visitor.visitClassReference(this, data)

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/RemapTypes.kt

@@ -7,10 +7,7 @@ package org.jetbrains.kotlin.ir.util
 
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.declarations.*
-import org.jetbrains.kotlin.ir.expressions.IrExpression
-import org.jetbrains.kotlin.ir.expressions.IrMemberAccessExpression
-import org.jetbrains.kotlin.ir.expressions.IrTypeOperatorCall
-import org.jetbrains.kotlin.ir.expressions.IrVararg
+import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
 import org.jetbrains.kotlin.ir.visitors.acceptChildrenVoid
 import org.jetbrains.kotlin.ir.visitors.acceptVoid
@@ -88,4 +85,9 @@ private class RemapTypesHelper(private val typeRemapper: TypeRemapper) : IrEleme
         expression.varargElementType = typeRemapper.remapType(expression.varargElementType)
         super.visitVararg(expression)
     }
+
+    override fun visitClassReference(expression: IrClassReference) {
+        expression.classType = typeRemapper.remapType(expression.classType)
+        super.visitClassReference(expression)
+    }
 }