Crashes when built using -Cpanic=abort

[h33p]

proc-macro2 crashes during parsing when building with -Cpanic=abort flag. cbindgen-0.14.4/src/bindgen/parser.rs:229 leads all the way to proc-macro2-1.0.19/src/detection.rs:59 where it panics and aborts. This is a proc-macro2 issue in question: dtolnay/proc-macro2#218

Solution would be to incorporate proc_macro2::fallback::force() somewhere in the code.

[jschwe]

Can this issue be closed? The upstream issues was closed end of 2021.