Integer overflow when creating circuits from QASM files with large ints #12773
Description
Environment
- Qiskit version: 1.1.1
- Python version:
- Operating system:
What is happening?
As reported Qiskit/benchpress#17, qasm imports lead to int overflows when qasm files contain large ints. E.g. this example will fail
OPENQASM 2.0;
include "qelib1.inc";
qreg q0[301];
creg c0[301];
h q0[300];
measure q0[300] -> c0[300];
if(c0==2037035976334486086268445688409378161051468393665936250636140449354381299763336706183397376) h q0[0];
with
thread '<unnamed>' panicked at crates/qasm2/src/lex.rs:279:42:
called `Result::unwrap()` on an `Err` value: ParseIntError { kind: PosOverflow }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
PanicException: called `Result::unwrap()` on an `Err` value: ParseIntError { kind: PosOverflow }
How can we reproduce the issue?
Run the above QASM file with QuantumCircuit.from_qasm_file
What should happen?
It should be imported
Any suggestions?
The int is larger than int64, which I assume is the root cause.