Function patch_seq_make_closure 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn patch_seq_make_closure(
    fn_ptr: u64,
    env: *mut [Value],
) -> Value

Create a closure value from a function pointer and environment

Takes ownership of the environment (converts raw pointer to Arc). Arc enables TCO: no cleanup needed after tail calls.

Safety

• fn_ptr must be a valid function pointer (will be transmuted when called)
• env must be a valid pointer from create_env, fully populated via env_set
• env ownership is transferred to the Closure value