Closure scope when translating to openqasm2

[jon-wurtz]

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Describe the bug

Variables declared in a function scope and captured within closure are not appropriately captured outside closure.

Steps to reproduce the bug

def make_foo():
    N = 4
    @cudaq.kernel
    def foo():
        q = cudaq.qvector(N)
        for i in range(N):
            h(q[i])
    return foo
foo_kernel = make_foo()
@cudaq.kernel
def bar():
    foo_kernel()

qasm_string = cudaq.translate(bar, format="openqasm2")

raises the error
CompilerError: <ipython-input-14-c51fd9788594>:7: error: Invalid variable name requested - 'N' is not defined within the quantum kernel it is used in. (offending source -> N)

If bar is declared within the scope of make_foo, the program works correctly

def make_bar():
    N = 4
    @cudaq.kernel
    def foo():
        q = cudaq.qvector(N)
        for i in range(N):
            h(q[i])
    return foo

    @cudaq.kernel
    def bar():
        foo()
    return bar
qasm_string = cudaq.translate(make_bar(), format="openqasm2")

Expected behavior

The translation function should work without error (make_foo and make_bar)

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

Not a regression

Environment

• CUDA-Q version:
• Python version:
• C++ compiler:
• Operating system:

Suggestions

No response