1 error[E0308]: mismatched types
2 --> $DIR/issue-75801.rs:17:6
4 LL | let _bar: u32 = $arg;
5 | --- expected due to this
8 | ^^^^^ expected `u32`, found `&str`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.