Bump Rust toolchain channel from 1.79 to 1.80

Upgrade the version of Rust and related tooling from 1.79.0 to 1.80.0,
which was recently released [1].

The `io_error_more` gate is still applicable (verified based on the
corresponding GitHub issue and running the tests with the related code
removed).

One new clippy lints from the "restriction" category ise enabled for
this project because I think it's a sensible restriction. Also, the new
`unexpected_cfgs` lint has been explicitly configured so that it
1) errors instead of warns and 2) does not trigger for the tarpaulin
config used by this project.

--
1. https://blog.rust-lang.org/2024/07/25/Rust-1.80.0.html

CONTRIBUTING.md

@@ -110,7 +110,7 @@ To be able to contribute you need the following tooling:
 
 - [git] v2;
 - [Just] v1;
-- [Rust] and [Cargo] v1.79 (edition 2021) with [Clippy], [rustfmt] (see `rust-toolchain.toml`);
+- [Rust] and [Cargo] v1.80 (edition 2021) with [Clippy], [rustfmt] (see `rust-toolchain.toml`);
 - (Optional) [cargo-all-features] v1.7.0 or later;
 - (Optional) [cargo-deny] v0.14.2 or later;
 - (Optional) [cargo-mutants] v23.5.0 or later;

Cargo.toml

@@ -40,6 +40,9 @@ proptest = "1.5.0"
 proptest-attr-macro = "1.0.0"
 proptest-derive = "0.4.0"
 
+[lints.rust]
+unexpected_cfgs = { level = "deny", check-cfg = ['cfg(tarpaulin_include)'] }
+
 [profile.release]
 debug = false
 debug-assertions = false

Containerfile.dev

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: MIT-0
 
-FROM docker.io/rust:1.79.0-alpine3.19
+FROM docker.io/rust:1.80.0-alpine3.19
 
 RUN apk add --no-cache \
 	bash git just libressl-dev musl-dev perl

Justfile

@@ -231,6 +231,7 @@ _profile_prepare:
 		--deny clippy::rc_buffer \
 		--deny clippy::rc_mutex \
 		--deny clippy::ref_patterns \
+		--deny clippy::renamed_function_params \
 		--deny clippy::string_lit_chars_any \
 		--deny clippy::unwrap_used \
 		\

README.md

@@ -62,7 +62,7 @@ rm -fq file1 file2
 
 ## Build from Source
 
-To build from source you need [Rust] and [Cargo], v1.79 or higher, installed on your system. Then
+To build from source you need [Rust] and [Cargo], v1.80 or higher, installed on your system. Then
 run the command:
 
 ```shell

rust-toolchain.toml

@@ -1,7 +1,7 @@
 # Check out rustup at: https://rust-lang.github.io/rustup/index.html
 
 [toolchain]
-channel = "1.79.0"
+channel = "1.80.0"
 components = [
     "cargo",
     "clippy",

src/main.rs

@@ -2755,7 +2755,7 @@ mod rm {
         trace!("remove {entry}");
 
         if entry.is_dir() && !fs::is_empty(&entry) {
-            // This case is handled explicitly because, as of Rust 1.79, the `io::ErrorKind` variant
+            // This case is handled explicitly because, as of Rust 1.80, the `io::ErrorKind` variant
             // is still experimental (gate "io_error_more") and so would result in an unknown error.
             // This implementation leaves a possibility for a TOCTOU issue, but this will be handled
             // safely as `std::fs::remove_dir` doesn't remove non-empty directories.