fix lint error

Author: georgehao

.github/workflows/lint.yaml

@@ -19,14 +19,14 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - uses: rui314/setup-mold@v1
-      - uses: dtolnay/rust-toolchain@clippy
+      - uses: dtolnay/rust-toolchain@nightly-2026-01-05
         with:
           components: clippy
       - uses: Swatinem/rust-cache@v2
         with:
           cache-on-failure: true
       - name: Run clippy
-        run: cargo clean && cargo clippy --workspace --lib --examples --tests --benches --all-features --locked
+        run: cargo clippy --workspace --lib --examples --tests --benches --all-features --locked
         env:
           RUSTFLAGS: -D warnings
 
@@ -36,7 +36,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - uses: rui314/setup-mold@v1
-      - uses: dtolnay/rust-toolchain@nightly
+      - uses: dtolnay/rust-toolchain@nightly-2026-01-05
         with:
           components: rustfmt
       - name: Run fmt
@@ -58,7 +58,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - uses: rui314/setup-mold@v1
-      - uses: dtolnay/rust-toolchain@nightly
+      - uses: dtolnay/rust-toolchain@nightly-2026-01-05
       - uses: Swatinem/rust-cache@v2
         with:
           cache-on-failure: true
@@ -87,7 +87,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - uses: rui314/setup-mold@v1
-      - uses: dtolnay/rust-toolchain@nightly
+      - uses: dtolnay/rust-toolchain@nightly-2026-01-05
       - uses: Swatinem/rust-cache@v2
         with:
           cache-on-failure: true