error: 1 positional argument in format string, but no arguments were given
  --> $DIR/issue-103826.rs:2:14
   |
LL |     format!("{\x7D");
   |              ^^^^^

error: 1 positional argument in format string, but no arguments were given
  --> $DIR/issue-103826.rs:4:14
   |
LL |     format!("\x7B\x7D");
   |              ^^^^^^^^

error: 2 positional arguments in format string, but no arguments were given
  --> $DIR/issue-103826.rs:6:14
   |
LL |     format!("{\x7D {\x7D");
   |              ^^^^^ ^^^^^

error: aborting due to 3 previous errors