`[T]::pop_front()` errors during execution inside a dynamic non-executed `if`

[michaeljklein]

Aim

Similar to 5462, but the if's predicate isn't known at compile time.

Attempted to nargo execute the following program:

fn main(x: bool) {
    println("x's value:");
    println(x);
    println("");

    if x {
        let empty_slice: [u8] = &[];
        let _ = empty_slice.pop_front();
    }
}

NOTE: re-enable the array_regex tests once this is resolved

Expected Behavior

Expected the program to print the following and execute successfully:

x's value:
false

Bug

Program fails at execution time with the following error:

x's value:
false

error: Index out of bounds, array has size 0, but index was 0
  ┌─ /Users/michaelklein/Coding/rust/noir/test_programs/execution_success/regression_test_5462/src/main.nr:8:17
  │
8 │         let _ = empty_slice.pop_front();
  │                 ---------------------
  │
  = Call stack:
    1. /Users/michaelklein/Coding/rust/noir/test_programs/execution_success/regression_test_5462/src/main.nr:8:17

Failed to solve program: 'Index out of bounds, array has size 0, but index was 0'

To Reproduce

Workaround

None

Workaround Description

No response

Additional Context

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Project Impact

None

Blocker Context

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Nargo Version

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NoirJS Version

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Proving Backend Tooling & Version

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