error: expected one of `>`, a const expression, lifetime, or type, found `}`
  --> $DIR/missing-closing-angle-bracket-struct-field-ty.rs:9:1
   |
LL | pub struct Foo {
   |            --- while parsing this struct
...
LL |     c: Arc<Mutex<usize>>,
   |                          - expected one of `>`, a const expression, lifetime, or type
LL | }
   | ^ unexpected token
   |
help: you might have meant to end the type parameters here
   |
LL |     b: Arc<Mutex<usize>>,
   |                        +

error: aborting due to previous error