FATAL: Recursion limit (9) exceeded
    at opt-r-decrease.asm::m(4) <- opt-r-decrease.asm::m(7) <- opt-r-decrease.asm::m(7) <- opt-r-decrease.asm::m(7) <- opt-r-decrease.asm::m(7) <- opt-r-decrease.asm::m(7) <- opt-r-decrease.asm::m(7) <- opt-r-decrease.asm::m(7) <- opt-r-decrease.asm::m(7) <- opt-r-decrease.asm::m(7) <- opt-r-decrease.asm(11)