From 396a3a5f1f0c18ee8ff657c3580245440672577b Mon Sep 17 00:00:00 2001
From: letypequividelespoubelles
 <54240434+letypequividelespoubelles@users.noreply.github.com>
Date: Sun, 17 Dec 2023 09:47:42 +0100
Subject: [PATCH] fix(romLex): wrong stack arg for extcodecopy address (#498)

---
 .../net/consensys/linea/zktracer/module/romLex/RomLex.java  | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arithmetization/src/main/java/net/consensys/linea/zktracer/module/romLex/RomLex.java b/arithmetization/src/main/java/net/consensys/linea/zktracer/module/romLex/RomLex.java
index 45f1b28fac..fca2b67629 100644
--- a/arithmetization/src/main/java/net/consensys/linea/zktracer/module/romLex/RomLex.java
+++ b/arithmetization/src/main/java/net/consensys/linea/zktracer/module/romLex/RomLex.java
@@ -224,11 +224,11 @@ public void tracePreOpcode(MessageFrame frame) {
       }
 
       case EXTCODECOPY -> {
-        final Address calledAddress = Words.toAddress(frame.getStackItem(1));
-        final long size = Words.clampedToLong(frame.getStackItem(3));
+        final Address calledAddress = Words.toAddress(frame.getStackItem(0));
+        final long length = Words.clampedToLong(frame.getStackItem(3));
         final boolean isDeploying =
             hub.conflation().deploymentInfo().isDeploying(frame.getContractAddress());
-        if (size == 0 || isDeploying) {
+        if (length == 0 || isDeploying) {
           return;
         }
         final int depNumber = hub.conflation().deploymentInfo().number(frame.getContractAddress());