release 1.0.90 regression from 1.0.89: wit-bindgen panicking

[pchickey]

wit-bindgen takes a dependency on syn = { version = "2.0", features = ["printing"] }.

In projects with unlocked deps, this macro is panicking when compiled with latest patch release of syn, and with it proc-macro2 1.0.90. It shows the message
= help: message: compiler/fallback mismatch #949 which I believe is coming from src/wrapper.rs:48 in this package, and therefore set_span.

For an example of the failure https://github.com/yoshuawuyts/wstd/actions/runs/11946511007/job/33301083203?pr=22#step:4:535

Earlier today same packages built with proc-macro2 1.0.89 https://github.com/yoshuawuyts/wstd/actions/runs/11940671307/job/33283840092#step:4:151

Unfortunately I don't understand the internals of this crate enough to diagnose further. Is this my issue, or a bug in the latest proc-macro2 release?

[sehz]

All our project builds are now failing due to this. We rely on wit-bindgen.

[sehz]

@dtolnay, is possible to revert changes and do another release?

[dtolnay]

This is fixed in 1.0.91.

[sehz]

Confirm fixed works. Thanks!

[pchickey]

Thanks for the quick fix!