error[E0308]: mismatched types
  --> $DIR/occurs-check-3.rs:14:24
   |
LL | fn main() { let c; c = clam::a(c); match c { clam::a::<isize>(_) => { } } }
   |                        ^^^^^^^^^^ cyclic type of infinite size

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.