[FIR] Enter loops in resolve using independent context

compiler/testData/ir/irText/firProblems/DeepCopyIrTree.kt

@@ -0,0 +1,45 @@
+// WITH_RUNTIME
+// FULL_JDK
+
+interface IrType
+
+interface TypeRemapper {
+    fun enterScope(irTypeParametersContainer: IrTypeParametersContainer)
+    fun remapType(type: IrType): IrType
+    fun leaveScope()
+}
+
+interface IrTypeParametersContainer : IrDeclaration, IrDeclarationParent {
+    var typeParameters: List<IrTypeParameter>
+}
+
+interface IrDeclaration
+interface IrTypeParameter : IrDeclaration {
+    val superTypes: MutableList<IrType>
+}
+interface IrDeclarationParent
+
+class DeepCopyIrTreeWithSymbols(private val typeRemapper: TypeRemapper) {
+    private fun copyTypeParameter(declaration: IrTypeParameter): IrTypeParameter = declaration
+
+    fun IrTypeParametersContainer.copyTypeParametersFrom(other: IrTypeParametersContainer) {
+        this.typeParameters = other.typeParameters.map {
+            copyTypeParameter(it)
+        }
+
+        typeRemapper.withinScope(this) {
+            for ((thisTypeParameter, otherTypeParameter) in this.typeParameters.zip(other.typeParameters)) {
+                otherTypeParameter.superTypes.mapTo(thisTypeParameter.superTypes) {
+                    typeRemapper.remapType(it)
+                }
+            }
+        }
+    }
+}
+
+inline fun <T> TypeRemapper.withinScope(irTypeParametersContainer: IrTypeParametersContainer, fn: () -> T): T {
+    enterScope(irTypeParametersContainer)
+    val result = fn()
+    leaveScope()
+    return result
+}