failed to resolve. Could not find Punct in proc_macro

[truckydev]

I have this error when I try the example :
Maybe an answer here ...
rust-lang/rust#46489

proc-macro2-0.4.9/src/unstable.rs:131:42
    |
131 |                 let mut op = proc_macro::Punct::new(tt.as_char(), spacing);
    |                                          ^^^^^ Could not find `Punct` in `proc_macro`

[mikeyobrien]

I was able to resolve this issue by downloading and using the nightly toolchain as the default.

rustup install nightly

followed by,

rustup default nightly

[chinedufn]

Yup latest nightly should work - feel free to re-open if that doesn't solve your issue!