…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...
```
5e72cf5687