From f41df210421a16f3d46295f6693cca5817eb0e9a Mon Sep 17 00:00:00 2001
From: a3moses <a3moses@uwaterloo.ca>
Date: Mon, 9 Dec 2024 10:57:57 -0500
Subject: [PATCH] fix to execute_circuit_steps_once_, all unit tests pass.

---
 include/qpp/classes/qengine.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/qpp/classes/qengine.hpp b/include/qpp/classes/qengine.hpp
index bf4bce4b5..a7b562f07 100644
--- a/include/qpp/classes/qengine.hpp
+++ b/include/qpp/classes/qengine.hpp
@@ -240,7 +240,9 @@ class QEngineT : public QBaseEngine<T, QCircuit> {
         }
 
         bool measured = false;
-        for (auto it = steps[pos]; it.get_ip() < steps.size(); ++it) {
+        auto it = steps[0];
+        it.advance(pos);
+        for (; it.get_ip() < steps.size(); ++it) {
             if (internal::is_measurement(it)) {
                 measured = true;
             }