os-rust/tests/ui/macros/issue-51848.stderr

error: invalid format string: expected `}` but string was terminated
  --> $DIR/issue-51848.rs:6:20
   |
LL |         println!("{");
   |                   -^ expected `}` in format string
   |                   |
   |                   because of this opening brace
...
LL |     macro_with_error!();
   |     ------------------- in this macro invocation
   |
   = note: if you intended to print `{`, you can escape it using `{{`
   = note: this error originates in the macro `macro_with_error` (in Nightly builds, run with -Z macro-backtrace for more info)

error: invalid format string: unmatched `}` found
  --> $DIR/issue-51848.rs:18:15
   |
LL |     println!("}");
   |               ^ unmatched `}` in format string
   |
   = note: if you intended to print `}`, you can escape it using `}}`

error: aborting due to 2 previous errors