Error handling when missing parentheses

[justinlietz]

Required prerequisites

• Consult the security policy. If reporting a security vulnerability, do not report the bug using this form. Use the process described in the policy to report the issue.
• Make sure you've read the documentation. Your issue may be addressed there.
• Search the issue tracker to verify that this hasn't already been reported. +1 or comment there if it has.
• If possible, make a PR with a failing test to give us a starting point to work on!

Describe the bug

If the user forgets to add the parentheses to the cudaq.qubit constructor, the error:
IndexError: pop from an empty deque
is returned.

Steps to reproduce the bug

import cudaq

@cudaq.kernel
def test_kernel():
    # state_reg = cudaq.qubit()
    state_reg = cudaq.qubit

    x(state_reg)

counts = cudaq.sample(test_kernel);
print(counts)

Expected behavior

An error that helps identify the offending line of code.

Is this a regression? If it is, put the last known working version (or commit) here.

Not a regression

Environment

-Docker Image ID: 109eb1c12738

Suggestions

No response