error: recursion limit reached while expanding the macro `recurse` --> $DIR/recursion_limit_macro.rs:20:31 | 20 | ($t:tt $($tail:tt)*) => { recurse!($($tail)*) }; | ^^^^^^^^^^^^^^^^^^^ ... 24 | recurse!(0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9); | -------------------------------------------------- in this macro invocation | = help: consider adding a `#![recursion_limit="20"]` attribute to your crate