| error: expected one of `!`, `,`, or `::`, found `(` | |
| --> $DIR/issue-54516.rs:4:58 | |
| | | |
| LL | println!("{}", std::mem:size_of::<BTreeMap<u32, u32>>()); | |
| | - ^ expected one of `!`, `,`, or `::` here | |
| | | | |
| | 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 | |