chore(lints): bump toolchain to make it work again

ci/rust-toolchain

@@ -1,7 +1,7 @@
 # To update toolchain, do the following:
 # 1. update this file
-# 2. update lints/rust-toolchain, lints/Cargo.toml
-# 3. update ci/build-ci-image.sh and ci/docker-compose.yml to build a new CI image
+# 2. update ci/build-ci-image.sh and ci/docker-compose.yml to build a new CI image
+# 3. (optional) **follow the instructions in lints/README.md** to update the toolchain and dependencies for lints
 
 [toolchain]
 channel = "nightly-2023-12-26"

lints/Cargo.toml

@@ -11,13 +11,14 @@ crate-type = ["cdylib"]
 name = "format_error"
 path = "ui/format_error.rs"
 
+# See `README.md` before bumping the version.
 [dependencies]
-clippy_utils = { git = "https://github.com/rust-lang/rust-clippy", rev = "e4c626dd9a17a23270bf8e7158e59cf2b9c04840" } # should match the toolchain version (rustc -vV)
-dylint_linting = "2.5.0"
+clippy_utils = { git = "https://github.com/rust-lang/rust-clippy", rev = "6fd0258e45105161b7e759a22e7350958e5cb0b1" }
+dylint_linting = "2.6.0"
 itertools = "0.12"
 
 [dev-dependencies]
-dylint_testing = "2.5.0"
+dylint_testing = "2.6.0"
 
 # UI test dependencies
 tracing = "0.1"

lints/README.md

@@ -4,10 +4,18 @@ Custom lints for RisingWave to enforce code style and best practices, empowered
 
 See [cargo dylint](https://github.com/trailofbits/dylint) for more information.
 
+## Install `cargo-dylint`
+
+```bash
+cargo install dylint
+```
+
 ## Run lints
 
 To run all lints, run `cargo dylint --all` in the root of the repository.
 
+If you find there are some compile errors, try updating the `cargo-dylint` binary by installing it again.
+
 ## Add new lints
 
 To add a new lint, add a new file in the `src` directory to declare the lint, then register it in `fn register_lints(..)` in `lib.rs`.
@@ -19,3 +27,16 @@ To test a lint, create a new file in the `ui` directory and add it as an `exampl
 ## VS Code integration
 
 Duplicate `.vscode/settings.json.example` to `.vscode/settings.json` to enable rust-analyzer integration for developing lints.
+
+## Bump toolchain
+
+The version of the toolchain is specified in `rust-toolchain` file under current directory.
+It does not have to be exactly the same as the one used to build RisingWave, but it should be close enough to avoid compile errors.
+
+The information below can be helpful in finding the appropriate version to bump to.
+
+- The toolchain used by the latest version of `cargo-dylint`: https://github.com/trailofbits/dylint/blob/master/internal/template/rust-toolchain
+- The toolchain used by the latest version of `clippy`: https://github.com/rust-lang/rust-clippy/blob/master/rust-toolchain
+- The hash of the latest commit in `rust-lang/rust-clippy` repo for the dependency `clippy-utils`.
+
+Run the lints after bumping the toolchain to verify it works.

lints/rust-toolchain

@@ -1,3 +1,5 @@
+# See `README.md` before bumping the version.
+
 [toolchain]
-channel = "nightly-2023-12-26"                      # should be identical to the root one
+channel = "nightly-2024-01-11"
 components = ["llvm-tools-preview", "rustc-dev"]