error: expected token: `,` | |
--> $DIR/issue-54516.rs:4:58 | |
| | |
LL | println!("{}", std::mem:size_of::<BTreeMap<u32, u32>>()); | |
| - ^ expected `,` | |
| | | |
| help: maybe write a path separator here: `::` | |
| | |
= note: `#![feature(type_ascription)]` lets you annotate an expression with a type: `<expr>: <type>` | |
= note: for more information, see https://github.com/rust-lang/rust/issues/23416 | |
error: aborting due to previous error | |