error: no rules expected the token `{`
  --> tests/ui/delimiter-span.rs:19:16
   |
5  | macro_rules! picky {
   | ------------------ when calling this macro
...
19 |         picky!({ 123, self });
   |                ^ no rules expected this token in macro call
   |
   = note: while trying to match sequence start

error: no rules expected the token `{`
  --> tests/ui/delimiter-span.rs:20:16
   |
5  | macro_rules! picky {
   | ------------------ when calling this macro
...
20 |         picky!({ 123 });
   |                ^ no rules expected this token in macro call
   |
   = note: while trying to match sequence start