error[E0599]: no method named `FIRST_ARG_MUST_EITHER_BE_Span_OR_IMPLEMENT_ToTokens_OR_BE_SpanRange` found for reference `&Foo` in the current scope
 --> $DIR/misuse.rs:8:5
  |
4 | struct Foo;
  | ----------- doesn't satisfy `Foo: quote::to_tokens::ToTokens`
...
8 |     abort!(Foo, "BOOM");
  |     ^^^^^^^^^^^^^^^^^^^^ method not found in `&Foo`
  |
  = note: the method `FIRST_ARG_MUST_EITHER_BE_Span_OR_IMPLEMENT_ToTokens_OR_BE_SpanRange` exists but the following trait bounds were not satisfied:
          `Foo: quote::to_tokens::ToTokens`
          which is required by `&Foo: proc_macro_error::__export::ToTokensAsSpanRange`
  = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)