fix qasm with reset (#9819)

(cherry picked from commit 8ceb57d)

Author: t-imamichi

qiskit/circuit/quantumcircuit.py

@@ -1683,7 +1683,7 @@ def qasm(
                     bit_labels[clbit],
                 )
             elif operation.name == "reset":
-                string_temp += f"reset {bit_labels[instruction.qubits[0]]}\n"
+                string_temp += f"reset {bit_labels[instruction.qubits[0]]};\n"
             elif operation.name == "barrier":
                 qargs = ",".join(bit_labels[q] for q in instruction.qubits)
                 string_temp += "barrier;\n" if not qargs else f"barrier {qargs};\n"

releasenotes/notes/fix-qasm-reset-ef7b07bf55875be7.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    Fixed :meth:`~.QuantumCircuit.qasm` so that it appends ``;`` after ``reset`` instruction.

test/python/circuit/test_circuit_qasm.py

@@ -598,6 +598,18 @@ def test_circuit_qasm_with_permutations(self):
 permutation__2_1_0_ q[0],q[1],q[2];\n"""
         self.assertEqual(qc.qasm(), expected_qasm)
 
+    def test_circuit_qasm_with_reset(self):
+        """Test circuit qasm() method with Reset."""
+        qc = QuantumCircuit(2)
+        qc.reset([0, 1])
+
+        expected_qasm = """OPENQASM 2.0;
+include "qelib1.inc";
+qreg q[2];
+reset q[0];
+reset q[1];\n"""
+        self.assertEqual(qc.qasm(), expected_qasm)
+
 
 if __name__ == "__main__":
     unittest.main()