error: recursion limit reached while expanding `#[attr]`
  --> $DIR/macro-rules-attr-infinite-recursion.rs:6:9
   |
LL |         #[attr] $($body)*
   |         ^^^^^^^
...
LL | #[attr]
   | ------- in this attribute macro expansion
   |
   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`macro_rules_attr_infinite_recursion`)
   = note: this error originates in the attribute macro `attr` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 1 previous error