unsupported proc macro punctuation character '_' from v1.0.69 -> v1.0.89

[Kreijstal]

I was trying to update this subdirectory
https://github.com/pascalkuthe/OpenVAF/tree/master/sourcegen using cargo update... but for some reason what was allowed on 1.0.69 is now simply not allowed? I can't tell why it's detecting a rogue _. Is this a proc_macro2 bug?

[Veykril]

We've hit this in rust-analyzer as well where we were updating from 1.0.86 to latest (happened within a quote! invocation)

[Kreijstal]

We've hit this in rust-analyzer as well where we were updating from 1.0.86 to latest (happened within a quote! invocation)

It seems the bug gets in the way even on 1.0.69 to 1.0.70 weird!