Comments at the end of an OpenQasm 2.0 circuits gives an error #10770
Description
Environment
- Qiskit Terra version: 0.25.0
- Python version: 3.10.8
- Operating system:
What is happening?
If there is a comment as the last line of the OpenQasm 2, the from_qasm_str fails with the next error:
Traceback (most recent call last):
Cell In[16], line 27
QuantumCircuit.from_qasm_str(qasm_end_comment) # <- fails
File /opt/conda/lib/python3.10/site-packages/qiskit/circuit/quantumcircuit.py:2537 in from_qasm_str
return qasm2.loads(
File /opt/conda/lib/python3.10/site-packages/qiskit/qasm2/__init__.py:452 in loads
return _parse.from_bytecode(
File /opt/conda/lib/python3.10/site-packages/qiskit/qasm2/parse.py:214 in from_bytecode
for op in bc:
QASM2ParseError: '<input>:10,1: needed a start-of-statement token, but instead got /'
This was working in previous versions of Qiskit (can't confirm which version introduced the error).
How can we reproduce the issue?
from qiskit import QuantumCircuit
qasm_end_comment = """
OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
creg c[2];
h q[0];
cx q[0], q[1];
measure q -> c;
//comment"""
qasm_end_blank_line= """
OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
creg c[2];
h q[0];
cx q[0], q[1];
measure q -> c;
//comment
"""
QuantumCircuit.from_qasm_str(qasm_end_comment) # <- fails
QuantumCircuit.from_qasm_str(qasm_end_blank_line) # <- worksWhat should happen?
The OpenQasm is valid, so it should convert it to OpenQasm 2.0.
Any suggestions?
No response