fix: missing hash/equals implementation

arithmetization/src/main/java/net/consensys/linea/zktracer/bytestheta/BaseBytes.java

@@ -15,6 +15,8 @@
 
 package net.consensys.linea.zktracer.bytestheta;
 
+import java.util.Objects;
+
 import net.consensys.linea.zktracer.types.Bytes16;
 import org.apache.tuweni.bytes.Bytes32;
 import org.apache.tuweni.bytes.MutableBytes32;
@@ -50,6 +52,19 @@ protected BaseBytes(final Bytes32 arg) {
     bytes32 = arg.mutableCopy();
   }
 
+  @Override
+  public int hashCode() {
+    return Objects.hash(this.bytes32);
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    final BaseBytes that = (BaseBytes) o;
+    return Objects.equals(this.bytes32, that.bytes32);
+  }
+
   /**
    * Returns a new `Bytes16` object that is the high section (first 16 bytes) of the bytes32`
    * instance variable.

arithmetization/src/main/java/net/consensys/linea/zktracer/module/ext/ExtOperation.java

@@ -67,10 +67,10 @@ public boolean equals(Object o) {
     if (this == o) return true;
     if (o == null || getClass() != o.getClass()) return false;
     final ExtOperation that = (ExtOperation) o;
-    return Objects.equals(opCode, that.opCode)
-        && Objects.equals(arg1, that.arg1)
-        && Objects.equals(arg2, that.arg2)
-        && Objects.equals(arg3, that.arg3);
+    return Objects.equals(this.opCode, that.opCode)
+        && Objects.equals(this.arg1, that.arg1)
+        && Objects.equals(this.arg2, that.arg2)
+        && Objects.equals(this.arg3, that.arg3);
   }
 
   public ExtOperation(OpCode opCode, Bytes32 arg1, Bytes32 arg2, Bytes32 arg3) {

arithmetization/src/main/java/net/consensys/linea/zktracer/module/hub/Hub.java

@@ -901,7 +901,6 @@ public int lineCount() {
     return this.state.lineCount();
   }
 
-
   public int cumulatedTxCount() {
     return this.state.txCount();
   }

arithmetization/src/test/java/net/consensys/linea/zktracer/module/ext/TestDuplicatedOperations.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright ConsenSys AG.
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package net.consensys.linea.zktracer.module.ext;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import net.consensys.linea.zktracer.opcode.OpCode;
+import net.consensys.linea.zktracer.testing.BytecodeCompiler;
+import net.consensys.linea.zktracer.testing.BytecodeRunner;
+import net.consensys.linea.zktracer.testing.EvmExtension;
+import org.apache.tuweni.bytes.Bytes;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+@ExtendWith(EvmExtension.class)
+public class TestDuplicatedOperations {
+  @Test
+  void testDuplicate() {
+    BytecodeRunner.of(
+            BytecodeCompiler.newProgram()
+                .push(
+                    Bytes.fromHexString(
+                        "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"))
+                .push(0)
+                .push(0)
+                .op(OpCode.MULMOD)
+                .push(
+                    Bytes.fromHexString(
+                        "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"))
+                .push(0)
+                .push(0)
+                .op(OpCode.MULMOD)
+                .compile())
+        .zkTracerValidator(
+            zkTracer -> {
+              assertThat(zkTracer.getModulesLineCount().get("EXT")).isEqualTo(9);
+            })
+        .run();
+  }
+}