[IR] Improve stepping/LVT behavior around destructuring

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/Scope.kt

@@ -16,7 +16,6 @@
 
 package org.jetbrains.kotlin.ir.builders
 
-import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.declarations.IrDeclaration
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationParent
@@ -71,12 +70,14 @@ class Scope(val scopeOwnerSymbol: IrSymbol) {
         nameHint: String? = null,
         isMutable: Boolean = false,
         origin: IrDeclarationOrigin = IrDeclarationOrigin.IR_TEMPORARY_VARIABLE,
-        irType: IrType? = null
+        irType: IrType? = null,
+        startOffset: Int = irExpression.startOffset,
+        endOffset: Int = irExpression.endOffset
     ): IrVariable {
         return createTemporaryVariableDeclaration(
             irType ?: irExpression.type,
             nameHint, isMutable,
-            origin, irExpression.startOffset, irExpression.endOffset
+            origin, startOffset, endOffset
         ).apply {
             initializer = irExpression
         }