5 //~^ ERROR invalid format string: expected `'}'` but string was terminated
8 //~^ ERROR invalid format string: unmatched `}` found
9 let _ = format!("{_}", _ = 6usize);
10 //~^ ERROR invalid format string: invalid argument name `_`
11 let _ = format!("{a:_}", a = "", _ = 0);
12 //~^ ERROR invalid format string: invalid argument name `_`
13 let _ = format!("{a:._$}", a = "", _ = 0);
14 //~^ ERROR invalid format string: invalid argument name `_`
16 //~^ ERROR invalid format string: expected `'}'` but string was terminated
18 //~^ ERROR invalid format string: unmatched `}` found
19 let _ = format!("{\\}");
20 //~^ ERROR invalid format string: expected `'}'`, found `'\\'`
21 let _ = format!("\n\n\n{\n\n\n");
22 //~^ ERROR invalid format string
28 //~^ ERROR invalid format string
36 //~^ ERROR invalid format string
44 //~^^^ ERROR invalid format string
52 //~^^^ ERROR invalid format string: unmatched `}` found
53 println!("{} {} {}", 1, 2);
54 //~^ ERROR 3 positional arguments in format string, but there are 2 arguments