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/// Setup panic handler for WASM-4.
#[macro_export]
macro_rules! setup_panic_handler_w4 {
    () => {
        #[cfg(target_family = "wasm")]
        #[panic_handler]
        fn panic(info: &::core::panic::PanicInfo) -> ! {
            $crate::println_w4!("{}", info);
            core::arch::wasm32::unreachable();
        }
    };
}