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…llers/examples The proc-macro2 dependency at 1.0.50 results in a build error mentioning an unknown feature `proc_macro_span_shrink` that no longer exists in nightly. Per https://github.com/rust-lang/rust/issues/113152, updating proc-macro2 to the latest version fixes the error. The build error I saw before updating the proc-macro2 dependency was the following: ``` > cargo build --bin minimal Compiling proc-macro2 v1.0.50 Compiling bare-metal v0.2.5 Compiling typenum v1.16.0 Compiling nrf52833-hal v0.14.1 error[E0635]: unknown feature `proc_macro_span_shrink` --> /home/chcl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.50/src/lib.rs:92:30 | 92 | feature(proc_macro_span, proc_macro_span_shrink) | ^^^^^^^^^^^^^^^^^^^^^^ Compiling cortex-m v0.7.7 For more information about this error, try `rustc --explain E0635`. error: could not compile `proc-macro2` (lib) due to previous error warning: build failed, waiting for other jobs to finish... ```